Ancient 400-Mile Volcano Chain Buried Beneath China Reveals Secrets of Supercontinent Rodinia

A real scientific discovery of a ~700 km (about 400- mile) long fossilized Tonian- age magmatic (volcanic) arc belt buried beneath the Sichuan Basin in the Yangtze Block of South China, dating to roughly 820- 770 million years ago.

Rodinia was a Neoproterozoic supercontinent that existed roughly between 1.3- 0.75 billion years ago. It is the best- documented Precambrian supercontinent and played a central role in Earth’s tectonic, climatic, and biological evolution during the late Precambrian.

Illustration depicting the ancient 400-mile volcano chain buried beneath southern China, revealing sections of the supercontinent Rodinia.
AI generated by Grok

A real scientific discovery of a ~700 km (about 400- mile) long fossilized Tonian- age magmatic (volcanic) arc belt buried beneath the Sichuan Basin in the Yangtze Block of South China, dating to roughly 820- 770 million years ago.

Researchers from PetroChina and Nanjing University (and colleagues) combined:

  • Aeromagnetic surveys that revealed a NE- SW -trending positive magnetic anomaly belt (~700 km long and ~50 km wide), indicating iron- rich/(ultra)mafic rocks in the lower crust.
  • Seven deep boreholes (3.6- 6.5 km deep) that recovered Tonian (ca. 820- 770 Ma) rhyolites/granites of magmatic-arc affinity, overlain by Ediacaran sediments.
  • Geochronology, geochemistry, and seismic data confirming juvenile arc- related magmatism.

This places the belt well inland (at least 400- 900 km from the northwestern margin of the Yangtze Block), extending previously known circum-Yangtze Tonian arc systems (such as the Panxi- Hannan arc) into the continental interior. The preferred explanation is flat- slab subduction, in which an oceanic plate slides nearly horizontally far inland before steepening, producing magmatism far from the trench, analogous to processes observed in the modern Andes and inferred for other ancient systems.

The rocks formed during the Tonian period of the Neoproterozoic, around the time of the assembly and breakup of the supercontinent Rodinia. The structures have been dormant and buried under later sedimentary cover for hundreds of millions of years.

Broader implications

  • It expands understanding of Neoproterozoic tectonics and continental- arc systems in South China.
  • Large volcanic arcs can influence the global carbon cycle (via CO₂ release during eruptions and later drawdown through weathering), so this system is relevant to debates about Neoproterozoic climate, including possible contributions to “Snowball Earth” conditions, though the paper itself focuses primarily on the tectonic/magmatic evidence rather than claiming it rewrites climate history single-handedly.
  • It demonstrates how deep drilling and modern geophysics can reveal “hidden” ancient crustal architecture in stable basins that are otherwise inaccessible.

This Phys.org piece is a straightforward, accurate report of the peer- reviewed study (unlike some more sensational popular- science articles).

Geological Context of Rodinia

Rodinia was a Neoproterozoic supercontinent that existed roughly between 1.3- 0.75 billion years ago. It is the best- documented Precambrian supercontinent and played a central role in Earth’s tectonic, climatic, and biological evolution during the late Precambrian.

Timeline

PhaseApproximate AgeKey Events
Assembly1300- 900 MaGlobal mountain- building (Grenville- age orogenies). Continents accreted mainly around Laurentia (proto- North America).
Stable existence~900- 825 MaSupercontinent largely intact for ~150 million years.
Early rifting / breakup initiation825- 750 MaMantle superplume activity, widespread rifting, and bimodal magmatism. Major pulses at ~825 Ma, ~780 Ma, and ~750 Ma.
Main breakup750- 600 MaContinents dispersed diachronously. Opening of the proto-Pacific and other oceans.
Aftermath~630- 530 MaFragments reassembled into the short- lived Pannotia / greater Gondwana.

Configuration

Most reconstructions place Laurentia at the center of Rodinia. Other major blocks (Baltica, Amazonia, Australia, East Antarctica, India, Siberia, Congo, Kalahari, South China, etc.) were arranged around it. Exact positions remain debated, especially for South China:

  • Older “Missing Link” models placed South China between Laurentia and Australia.
  • Many recent models favor a peripheral (external) position, often near Australia- India- East Antarctica.

Tectonic & Geodynamic Significance

  • Rodinia’s assembly involved long- lived accretionary orogens that eventually collided (Grenville, Sveconorwegian, etc.).
  • Its breakup is widely linked to a mantle superplume (or superswell) that developed beneath the supercontinent due to thermal insulation and slab avalanches. This triggered large igneous provinces, rifting, and eventually continental separation.
  • The breakup created vast new passive margins and ocean basins, dramatically altering global geography.

Climatic & Biological Context

The breakup of Rodinia coincided with (and likely helped trigger) extreme climate events:

  • The Cryogenian “Snowball Earth” glaciations (Sturtian ~720- 660 Ma and Marinoan ~650- 635 Ma).
  • Dramatic changes in the carbon cycle, ocean chemistry, and the eventual rise of complex multicellular life in the Ediacaran and Cambrian.

Link to the Sichuan Basin Discovery

The ~700 km fossilized magmatic arc (820- 770 Ma) under China’s Sichuan Basin formed during the early breakup phase of Rodinia. It records subduction (likely flat- slab) along or near the margin of the Yangtze Block while the supercontinent was beginning to rift apart. This makes the discovery a direct window into the tectonic processes operating at the edges of Rodinia ~800 million years ago.

In short, Rodinia represents a pivotal chapter in Earth’s history, the last major supercontinent before the modern plate- tectonic regime fully matured and complex life exploded onto the scene.

A ∼700-km-Long Fossil Tonian Magmatic Arc Belt Hidden Within the Yangtze Block’s Interior, South China

Scientists have identified a ~700 km (about 400- mile) long fossilized magmatic arc (a chain of ancient volcanoes) buried deep beneath the Sichuan Basin in the interior of the Yangtze Block, South China.

  • It dates to the Tonian period of the Neoproterozoic era, specifically ca. 820- 770 million years ago.
  • The arc is marked by an iron- rich strip of rock detected through aeromagnetic surveys.
  • Confirmation came from seven deep boreholes (3.6- 6.5 km deep) that recovered rhyolites and granites of clear magmatic -arc chemical affinity.
  • The belt stretches inland at least 400- 900 km from the northwestern edge of the Yangtze Block, much farther inland than typical volcanic arcs.

The researchers attribute the unusually inland position to flat- slab subduction. In this process, an oceanic plate slides nearly horizontally beneath the continent for a long distance before sinking more steeply into the mantle. This can create magmatism far from the continental margin.

The new arc is interpreted as an inland extension of the known Panxi- Hannan arc system and is linked to southeastward oceanic subduction during the assembly and breakup of the supercontinent Rodinia.

Abstract and Core Findings

Fossil magmatic arcs are important records of juvenile magmatism, crustal growth, and differentiation. Some ancient arcs, however, lie buried in continental interiors under thick sedimentary cover, making them hard to detect.

This study uses a combination of:

  • Seven deep boreholes (∼3,600- 6,500 m deep) that reached the basement of the Sichuan Basin
  • Geochronology
  • Geochemistry
  • Aeromagnetic data
  • 3D seismic reflection profiles

Key results:

  • Widespread Tonian (ca. 820- 770 Ma) rhyolites and granites occur beneath the central Sichuan Basin, directly overlain by Ediacaran sediments.
  • Aeromagnetic surveys reveal a NE- SW- trending ∼700- km- long positive magnetic anomaly belt (PMAB) across the central basin. This indicates the presence of (ultra-) mafic rocks in the lower crust.
  • The felsic rocks recovered from boreholes within the PMAB show geochemical signatures consistent with derivation from a juvenile arc basaltic source.

The authors interpret the PMAB as recording the input of mantle- derived melts and their subsequent differentiation into granitic magmas. This represents a Tonian arc magmatic front that once existed in the interior of the Yangtze Block.

Tectonic Implications

  • The discovery extends the known circum-Yangtze Tonian continental arc system (including the Panxi-Hannan arc) far into the Yangtze Block’s interior.
  • The arc reaches at least 400- 900 km landward from the northwestern margin of the Yangtze Block.
  • The preferred explanation is flat- slab subduction, which allows magmatism to occur unusually far inland.

Significance

This is one of the best- documented examples of a long, inland fossil magmatic arc of Tonian age. It improves our understanding of the tectonic- magmatic evolution of South China during the breakup of the supercontinent Rodinia and shows how deep drilling and modern geophysics can reveal previously hidden crustal architecture.

Title: A ∼700‐km‐Long Fossil Tonian Magmatic Arc Belt Hidden Within the Yangtze Block’s Interior, South China

Published:  Journal of Geophysical Research: Solid Earth (2025)

DOI: 10.1029/2024JB030825

Authors: Zhidong Gu, Junyong Li, Xiaolei Wang, Ya Xu, Xiufen Zhai et al.

Abstract

Fossil magmatic arcs preserve important archives of juvenile magmatism, crustal growth and differentiation, thereby aiding in our understanding of continental evolutionary histories. However, some ancient arcs are situated in continental interiors, where they are buried beneath thick cover sequences, making their identification challenging. Here, we present a data set of deep boreholes, geochronology, geochemistry and geophysics to investigate the basement properties and evolution of the Sichuan Basin in the Yangtze Block, South China. These results provide evidence for a large Tonian magmatic arc belt hidden within the Yangtze Block’s interior. Seven deep boreholes (∼3,600–6,500 m) penetrating into basin basement, together with geochronology and 3D seismic reflection profiles, show extensive Tonian (ca. 820–770 Ma) rhyolite/granites overlain by Ediacaran sediments. Aeromagnetic data delineate a NE-SW-trending, ∼700-km-long positive magnetic anomaly belt (PMAB) across the central basin, indicating the presence of (ultra-) mafic rocks in lower crust. Petrogenetic analyses indicate that the Tonian felsic rocks drilled within PMAB range were likely derived from a juvenile arc basaltic source. Thus, we interpret the PMAB recorded input of mantle-derived melts and their subsequent evolution into granitic magmas, associated with a Tonian arc magmatic front that once occurred in the Yangtze Block’s interior. Our finding broadens the range of the Tonian continental arc system in the region, reaching at least 400–900 km landward from block’s northwestern margin. Such a broad orogenic system played a vital role in continental evolution, element recycling and basin formation of the Yangtze Block.

Britain Teaching Kids They have to Save the World from Climate Change

Britain stands on the brink of a self-inflicted green economic catastrophe. But British kids are being indoctrinated to go harder on climate action.

Back in the real world, renewables and climate policy have done nothing to help British energy security.

There is no legitimate reason for Britain to have a gas shortage – Britain is sitting on top of a lake of recoverable gas.

Britain has also recently made North Sea gas extraction more difficult, to the point it is likely no longer economically viable.

A humorous cartoon depicting a passionate teacher urging students to save the planet while one student questions their math homework. The teacher holds a large globe with 'SAVE THE WORLD!' written on it. The classroom features references to climate change, energy issues, and educational materials.

From Watts Up With That?

Essay by Eric Worrall

Britain stands on the brink of a self-inflicted green economic catastrophe. But British kids are being indoctrinated to go harder on climate action.

‘Young people have a responsibility on climate change’

Sophie Parker
Sat 19 September 2026 at 12:05 am AEST

A sixth former says young people have a “responsibility as the new generation” and a “chance to make a real difference” when it comes to climate change.

Jed from Royal Wootton Bassett Academy was one of many students from two Wiltshire schools to share his thoughts at the Sustain Britain Schools Conference 2026.

While Anna, a student at Malmesbury school said it is a “very big worry” and “quite frustrating because it just feels like not enough action is being taken”.

…

The conference was started by Sustain Britain after it realised last year it did not have anybody under 35 attending their usual event.

Jed added: “In the future we are the people that uphold the environment and we may have picked up some bad habits from the people that we’ve got it from”.

…

Malmesbury School geography teacher Sarah Blackburn explained that she would be taking some of what was said in the conference back to her lessons, which already include climate change.

…Read more: https://au.news.yahoo.com/teens-describe-hopes-fears-over-113330185.html

Back in the real world, renewables and climate policy have done nothing to help British energy security.

British Gas boss warns UK at risk of winter fuel shortage ‘with almost no gas in storage’

Athena Stavrou
Thu, 27 August 2026 at 11:37 PM AEST

Britain has “almost no gas in storage in the UK for the coming winter”, the boss of British Gas’s owner has said as the UK risks facing a fuel shortage this winter.

The chief executive of Centrica, Chris O’Shea, said “time is rapidly running out” as winter approaches, in what he called a “huge concern” for energy and national security.

It comes as households across Britain already face skyrocketing bills, as the impact of Donald Trump’s war on Iran continues to hit energy prices.

…Read more: https://nz.news.yahoo.com/british-gas-boss-warns-uk-115554775.html

There is no legitimate reason for Britain to have a gas shortage – Britain is sitting on top of a lake of recoverable gas.

Climate change: Cuadrilla ordered to plug and abandon shale gas fracking wells in Lancashire

Cuadrilla claims England’s shale gas could alleviate the cost of living crisis. Critics say fracked gas would have little impact on energy bills and renewables are the way forward.

Victoria Seabrook
Climate reporter @SeabrookClimate
Thursday 10 February 2022 12:11, UK

Cuadrilla is to plug and abandon two shale gas wells in Lancashire following orders from the government’s industry regulator, it confirmed in a statement.

Cuadrilla’s parent company AJ Lucas said the Oil and Gas Authority (OGA) had ordered it to permanently seal the two shale gas wells drilled at the Preston New Road (PNR) Lancashire shale exploration site.

…

Cuadrilla claims shale gas from the North of England has the potential to meet the UK’s energy needs and alleviate the cost of living crisis, as well as create jobs and aid levelling up.

Analysts and green campaigners say because gas is globally traded, meaning it is sold to the highest bidder, it is unlikely to help the UK.

Cuadrilla’s chief executive officer, Francis Egan, said he thought the decision had not “been properly thought through”.

“Leaving our own shale gas in the ground will make reducing global emissions even harder,” he said. “Emissions from importing gas are far higher than those from home-produced shale gas.”

…Read more: https://news.sky.com/story/climate-change-cuadrilla-ordered-to-plug-and-abandon-shale-gas-fracking-wells-in-lancashire-12538040

Britain has also recently made North Sea gas extraction more difficult, to the point it is likely no longer economically viable.

Lack of energy security is flowing through into industry.

Britain ‘faces deindustrialisation’ without relief from high energy prices, survey warns

Make UK says manufacturers’ feedback shows sector at risk of collapse as it calls on Treasury to take action

Phillip Inman
Mon 15 Jun 2026 15.00 AEST

Britain’s industrial sector is at risk of collapse as thousands of companies warn that they could face bankruptcy within the next year because of high energy prices, according to an industry survey.

The manufacturers’ body Make UK said the latest feedback from its members found that many would not be able to cope for much longer with energy costs that were twice the average in continental Europe and four times higher than in the US.

A survey revealed that a quarter of manufacturing companies either planned to move their production overseas or had already done so, while one in 10 companies believed it was likely or very likely they would be insolvent within the next 12 months.

…Read more: https://www.theguardian.com/business/2026/jun/15/britain-faces-deindustrialisation-relief-energy-prices-survey-make-uk

The market has noticed the British economy is in severe difficulties.

UK pays highest borrowing cost since 1998 at gilt sale

Thirty-year gilts priced at a yield of 5.82%, underscoring pressure on public finances from global bond sell-off

Ian Smith in London
PublishedSEP 8 2026
UpdatedSEP 9 2026, 00:18

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https://www.ft.com/content/b23151c3-b4c1-4f96-a801-f3507d907cc7?syn-25a6b1a6=1

The UK has paid the highest borrowing cost on a sale of its debt in almost three decades, as the global bond sell-off intensifies the pressure on public finances ahead of a crunch Budget. A £4bn sale of 30-year debt on Tuesday was priced at a yield of 5.82 per cent, the UK Debt Management Office said, the highest interest rate on any gilt issuance since the DMO’s creation in 1998. “The success of the transaction, notwithstanding a volatile market environment, provides further demonstration of the ongoing strength and depth of the gilt market and the valuable support from its participants for our financing programme,” said Jessica Pulay, the DMO’s chief executive.

…

The UK’s 10-year borrowing costs, which are the more closely watched indicator, are the highest in the G7 at 5.2 per cent. The DMO has already paid its highest 10-year borrowing cost since 2008 earlier this year, after yields climbed.

…Read more: https://www.ft.com/content/b23151c3-b4c1-4f96-a801-f3507d907cc7?syn-25a6b1a6=1

But these poor kids have not been taught the real reason the British economy is in such a mess. When those kids leave school, they’ll vote for more of the same, and support politicians who want to crack down even harder. They will support more taxes on fossil fuel, and a continuation of the gas fracking moratorium. Because they’ve been taught it’s their job to complete the green revolution their parents are hesitating to progress, by educators who seem more interested in indoctrinating little climate warriors than preparing kids for life in the real world.

Satellites Reveal: Greenland and Antarctica Lost Over 11 Trillion Tons of Ice Since the 1970s — 84% Driven by Speeding Glaciers

Satellites show Earth lost more than 12 trillion tons of ice from Greenland and Antarctica over ~47 years (roughly 1979- 2023), according to a major study published in Scientific Data.

SMB models refer to Surface Mass Balance models (or, more precisely, the surface mass balance components derived from regional climate models).

A digital illustration showing glaciers and icebergs in Greenland and Antarctica, accompanied by text highlighting significant ice loss revealed by satellites since the 1970s.
AI generated by Grok

Satellites show Earth lost more than 12 trillion tons of ice from Greenland and Antarctica over ~47 years (roughly 1979- 2023), according to a major study published in Scientific Data.

Key findings from the international collaboration (led in part by the European Space Agency’s IMBIE initiative, incorporating NASA satellite data for a longer record):

Total ice loss: about 12.5 trillion tons (11.3 trillion metric tons). This is enough to cover the continental United States with ice roughly 5 feet (1.5 meters) deep.

Sea- level contribution: This melt alone raised global sea levels by about 1 inch (≈3.1 cm) since 1979 (on top of other factors). Greenland accounts for a somewhat larger share.

Main driver: ~5/6 (about 84%) of the loss comes from dynamic processes, warmer ocean water undercutting and melting ice sheets from below/sides, accelerating glacier flow into the ocean, rather than surface melting from warmer air.

Acceleration: Ice sheets were relatively stable in the 1970s-1990s; losses ramped up later, especially in the 2010s. A temporary slowdown around 2020- 2023 (partly due to heavy snowfall in East Antarctica offsetting West Antarctic losses) was viewed as short- term variability; the longer- term accelerating trend has resumed.

Methods: Combined data from dozens of independent surveys and 27 satellites (including earlier Landsat archives) for the longest continuous satellite- based mass- balance record of the two ice sheets.

Scientists involved (including Ines Otosaka of Northumbria University and Eric Rignot of UC Irvine) emphasize that the dynamical ice discharge raises concerns about potential tipping points or instability, particularly in parts of Antarctica, with implications for continued sea- level rise and coastal flooding risk even if warming stabilizes. Independent experts noted the multi- method approach increases confidence in the upward trend.

The article is an Associated Press report by Seth Borenstein (dated around mid- to- late September 2026 in various outlets).

This extends earlier satellite records (previously focused more on the 1990s onward) and aligns with the broader observed pattern of accelerating polar ice loss linked to climate change.

_____________________________________________________________________________________

SMB models refer to Surface Mass Balance models (or, more precisely, the surface mass balance components derived from regional climate models).

In the context of the Greenland and Antarctic ice- sheet mass- balance study we discussed:

What is Surface Mass Balance (SMB)?

SMB is the net gain or loss of mass at the surface of an ice sheet. It is calculated as:

SMB=snowfall accumulation−(meltwater runoff+sublimation+evaporation+blowing-snow erosion)\text{SMB} = \text{snowfall accumulation} – (\text{meltwater runoff} + \text{sublimation} + \text{evaporation} + \text{blowing-snow erosion})

Positive SMB means the ice sheet is gaining mass at the surface (mainly from snowfall). Negative SMB means net surface loss (mainly from melting and runoff).

Role of SMB models in the study

The paper uses regional climate models (RCMs) to estimate SMB. These models simulate the atmosphere– ice- sheet interactions at relatively high spatial resolution over the polar regions. Common examples used in ice- sheet research include:

  • MAR (Modèle Atmosphérique Régional)
  • RACMO (Regional Atmospheric Climate Model)
  • HIRHAM
  • Other similar atmospheric models forced by global reanalyses (e.g., ERA5) or climate models

These models provide the time- varying SMB fields that are combined with satellite observations in the input- output method (also called the mass- budget method):

  • Ice discharge (how much ice flows into the ocean) is measured from satellites (velocity + ice thickness).
  • SMB is taken from the regional climate models.
  • Mass balance = SMB − ice discharge (plus any basal melt terms where relevant).

Key finding from the paper related to SMB

Of the total 11,309 ± 565 Gt of ice lost from Greenland and Antarctica (1979- 2023):

  • 84% came from ice dynamical imbalance (accelerated glacier flow and discharge into the ocean, largely driven by warmer ocean water).
  • 16% came from reduced SMB (mainly increased surface melting and runoff, especially in Greenland).

In Greenland, the split was roughly 67% dynamics / 33% SMB. In Antarctica, nearly all the loss was dynamical; SMB changes were smaller or even positive in some periods due to increased snowfall.

_____________________________________________________________________________________

Mass balance of the Greenland and Antarctic ice sheets from the 1970s to 2023

The Greenland and Antarctic ice sheets are major contributors to global mean sea- level rise and the largest source of uncertainty in future projections. This data descriptor compares and combines 42 independent estimates of ice- sheet mass balance derived from satellite observations of changes in ice flow, volume, and gravitational attraction.

It covers:

  • Greenland Ice Sheet (GrIS): 1972- 2023
  • Antarctic Ice Sheet (AIS) and its sectors (West Antarctica/WAIS, East Antarctica/EAIS, Antarctic Peninsula/APIS): 1979- 2023

Regional climate models are used to partition total mass balance into surface mass balance (SMB) and ice dynamical imbalance.

Key result: The ice sheets lost 11,309 ± 565 billion tonnes (Gt) of ice between 1979 and 2023. Glacier dynamical imbalance drove 84% of the loss; reduced surface mass balance accounted for the remaining 16%. The dataset supports tracking ice-sheet contributions to sea- level rise and constraining future projections.

Main quantitative findings

  • Combined (1979- 2023): 11,309 ± 565 Gt lost → 31.4 ± 1.6 mm global sea- level rise.
  • Antarctica (1979- 2023): 4,780 ± 513 Gt lost → 13.3 ± 1.4 mm sea- level rise. Essentially all of Antarctica’s losses were driven by ice dynamics.
  • Greenland (1972- 2023): 6,215 ± 467 Gt lost (average rate 119 ± 9 Gt yr⁻¹). ~67% from increased ice discharge, ~33% from reduced SMB. Greenland was near balance in the 1970s; losses rose from ~60 Gt yr⁻¹ in the 1980s to much higher rates later (e.g., hundreds of Gt yr⁻¹ in the 2010s). nature.com

Losses accelerated from the 1990s onward. A temporary slowdown in overall loss rates around 2020- 2023 (linked to high snowfall in East Antarctica and milder Greenland summers) is described as short- term variability rather than a change in the long- term trend.

Methods overview

Techniques: Input- output method (ice discharge and SMB models), satellite altimetry (volume change), and satellite gravimetry (mass change from gravity).

Satellites: Data from 27 missions, including early Landsat archives for velocity back to the 1970s.

Standardization: Individual estimates converted to monthly rates of mass change; reconciled into consensus time series with uncertainties. Peripheral glaciers/ice caps are accounted for where relevant.

Only mass changes that contribute to sea level are included (ice- shelf thinning/retreat and grounded ice below sea level are excluded from the sea-level contribution figures).

Data availability

Reconciled mass- balance time series (rates and cumulative anomalies for total mass, SMB, and dynamics, with uncertainties) are freely available at:


https://doi.org/10.5285/128c5e33-5224-4197-82f0-19dcc95b80a0

Code for aggregation is also openly available.

This extends previous IMBIE assessments (which focused more on the post- 1992 period) and provides the longest continuous satellite- based consensus record of the two ice sheets. The paper is open access.

Published:  Scientific Data volume 13, Article number: 1301 (2026)

DOI: 10.1038/s41597-026-08088-0

Authors: Lead authors include Inès N. Otosaka, Andrew Shepherd, and a large international team (IMBIE – Ice Sheet Mass Balance Inter-comparison Exercise).

Abstract

The Greenland and Antarctic ice sheets are major drivers of global mean sea level rise and are predicted to continue to do so in the future. However, they also represent the largest source of uncertainty in projections of future sea level rise making robust estimates of observed ice sheet mass changes critical. Here, we compare and combine 42 independent estimates of ice sheet mass balance derived from satellite observations of temporal changes in ice sheet flow, volume, and gravitational attraction to determine the ice sheet mass balance from 1972 (Greenland) and 1979 (Antarctica) until 2023. We then use regional climate models to partition the total mass balance into contributions associated with surface mass balance and ice dynamical imbalance. The ice sheets lost 11,309 ± 565 billion tonnes of ice between 1979 and 2023, with glacier dynamical imbalance driving 84% of the ice loss and surface mass balance the remainder. This dataset can be used to track the contribution of the ice sheets to sea level rise and constrain projections of future sea level rise.

Drought and Decline: How the 4.2 ka Climate Event Helped End Malta’s Temple Builders

The Megalithic Temples of Malta (and Gozo) form a group of prehistoric monumental stone buildings constructed mainly between roughly 3600 BC and 2500 BC.

The Megalithic Temples of Malta (including sites such as Ġgantija, Ħaġar Qim, Mnajdra, and Tarxien) are widely understood as sacred and ceremonial spaces central to the ritual life of the Neolithic Temple Period society (c. 3600- 2500 BC).

The 4.2 ka event (also called the 4.2-kiloyear event) was a period of significant climatic aridification centered around 4,200 years before present (approximately 2200 BC). It is often described as lasting one to a few centuries (broadly placed between about 4.3 and 3.8 ka), involving prolonged drought conditions in many regions of the Northern Hemisphere, including parts of the Mediterranean.

Arid landscape with cracked earth, scattered rocks, and dry vegetation under a cloudy sky at sunset.
AI generated by Grok

The Megalithic Temples of Malta (and Gozo) form a group of prehistoric monumental stone buildings constructed mainly between roughly 3600 BC and 2500 BC.

Key points align with archaeological consensus:

Dating and age: The main temple-building phases fall within the Temple Period (broadly c. 4100- 2500 BC), with the prominent free- standing structures belonging to the Ġgantija phase (c. 3600- 3000/3200 BC) through the Tarxien phase (c. 3000- 2500 BC). Sites such as Ġgantija (Gozo) and Ħaġar Qim date primarily to the earlier part of this range (around 3600- 3200 BC), making the oldest examples more than 5,500 years old today. They rank among the earliest known free- standing stone buildings in the world.

Comparison to the Egyptian pyramids: The Great Pyramid of Giza and related Giza structures are conventionally dated to around 2600- 2500 BC (e.g., Khufu’s pyramid c. 2580- 2560 BC). The earliest Maltese temples therefore predate them by several centuries to roughly a millennium.

Builders: They were constructed by a local, indigenous Neolithic population of farmers and herders on the Maltese islands (the culture associated with the Temple Period). This society developed the distinctive temple architecture locally after earlier Neolithic settlement of the islands; there is no evidence of direct external origin for the builders or the temple tradition itself. The culture disappeared around 2500 BC.

Several of these sites (including Ġgantija, Ħaġar Qim, Mnajdra, Tarxien, and others) are UNESCO World Heritage Sites, recognized for their architectural sophistication using local limestone, complex multi- apsed plans, and associated ritual/artistic features, all achieved without metal tools.

In short, the Maltese temples are older than the Giza pyramids and represent the work of the islands’ own Neolithic temple- building culture.

The Megalithic Temples of Malta (including sites such as Ġgantija, Ħaġar Qim, Mnajdra, and Tarxien) are widely understood as sacred and ceremonial spaces central to the ritual life of the Neolithic Temple Period society (c. 3600- 2500 BC).

Archaeologists infer these functions from the buildings’ distinctive architecture (concave façades with forecourts for gatherings, multi- apsed interiors with restricted access, altars, niches, and “oracle holes”), decorations (spirals, plants, animals), and finds (figurines, pottery, tools, and bones). UNESCO and specialist sources describe them as an important ritual focus of a highly organized society.

Religious rituals and ceremonial practices: Altars (some with plant or spiral reliefs), hearths showing burning, libation holes/grooves for liquid offerings, stone bowls, and possible oracle features point to structured rites. Some temples show astronomical alignments (e.g., solstice or seasonal light effects at Ħaġar Qim and Mnajdra), which may have marked calendrical or seasonal ceremonies.

Community gatherings: Large exterior forecourts, benches, and evidence of large- scale activity (including pottery and animal remains) indicate public assembly, processions, and communal events, sometimes interpreted as including feasting.

Fertility- related practices: Numerous “fat lady” (or obese anthropomorphic) figurines and statues, some clearly female with exaggerated features, others more asexual, along with plant motifs, animal reliefs (including suckling animals), and occasional phallic symbols are commonly linked to fertility, abundance, agriculture, and possibly a mother- goddess or regenerative deity concept. Interpretations vary; some scholars emphasize complementary male/female symbolism rather than a single dominant goddess.

Animal sacrifice: Strong evidence includes concentrations of domestic animal bones (sheep,goats, cattle, pigs), sometimes stacked near or inside altars; flint knives found in altar compartments (notably at Tarxien); tethering holes that may have held animals; and carved animal reliefs (bulls, sows, goats, etc.). These point to ritual slaughter, offerings, and associated feasting.

Ancestor worship: This element is more strongly evidenced in the contemporary underground hypogea (e.g., Ħal Saflieni Hypogeum and the Xagħra Circle), which served as collective burial places for thousands of individuals, often with red ochre, personal offerings, and figurines. The above- ground temples themselves generally lack human remains and appear dedicated to the living; however, the broader ritual landscape links “rituals of life” in the temples with “rituals of death” and ancestry in the hypogea. Some interpretations see continuity or parallel practices involving ancestors.

Exact beliefs remain inferred, as there are no written records. Alternative or complementary views exist, such as the temples functioning partly as community “clubhouses” for social display, feasting, and ritual sodalities, or incorporating practical/domestic elements alongside the sacred. The sudden end of the temple- building culture around 2500 BC leaves many details open to ongoing research. Overall, the sacred, ritual, fertility, sacrificial, and communal roles form the core consensus interpretation.

During the Temple Period (roughly 3600- 2500 BC), the Maltese islands experienced a Mediterranean climate that supported Neolithic farming and herding, but with progressive aridification and significant human-induced environmental change.

These factors interacted and are widely discussed as contributing (alongside social and other stresses) to the eventual end of the temple- building culture.

Climate conditions

The islands had a typically Mediterranean regime of wetter winters and dry summers. Paleoenvironmental evidence (pollen, molluscs, soils, and sediment cores) indicates that conditions were generally moist enough in the earlier phases to sustain woodland, cereals, and livestock. Over the Holocene, however, there was a long- term trend toward greater aridity in the central Mediterranean. Toward the later Temple Period (especially from around the mid- third millennium BC), records show increasing dryness, reduced cereal pollen (notably around 4.3 ka), and signs of drought stress.

The well- known 4.2 ka climate event (a widespread aridification episode centered roughly around 2200 BC) overlaps with or follows the final phases of the Temple culture. Regional proxies indicate declining precipitation that correlates with reduced archaeological activity in Malta. Some evidence suggests a possible temporary drop in population or near- abandonment in the centuries around or after 2500- 2400 BC before Bronze Age reoccupation.

Human impacts on the landscape

The temple builders transformed the environment substantially:

Deforestation began early (around 3800- 3500 BC) for fuel, agricultural clearance, and wooden elements in temple construction (e.g., roof supports). Pollen and charcoal records document major loss of native woodland.

Agriculture and grazing: Dry farming (cereals) and herding of sheeps and goats expanded. This led to soil erosion, exhaustion/fatigue from overcultivation, soil compaction, and inhibited forest regeneration through overgrazing. Rudimentary terracing was used in places, showing some adaptation.

Other effects included localized quarrying for limestone and overall biodiversity decline.

These anthropogenic pressures degraded soils and resources over centuries, reducing the islands’ carrying capacity despite the builders’ demonstrated resilience in earlier phases.

Role in the decline of the Temple culture

The abrupt cessation of temple building and the distinctive Temple Period culture around 2500 BC (transitioning into the Early Bronze Age- Tarxien Cemetery phase) is often linked to a combination of factors. Environmental degradation (exhausted soils, overgrazing, deforestation) combined with climate variability or droughts is frequently cited as contributing to stress on agriculture, food production, and social cohesion.

Studies (including the FRAGSUS project) indicate that climatic drying interacted with, but did not solely dictate, cultural change, the decline appears to have begun earlier in some places, with possible intensifying activity followed by transformation rather than total sudden collapse. Other hypothesized factors include demographic pressure, social or ritual changes, possible disease, or external contacts. The small size and limited resources of the islands made the society particularly vulnerable to combined environmental and climatic stresses.

In summary, the climate was viable for the sophisticated Neolithic society that built the temples for over a millennium, but progressive aridification plus intensive human land use created fragility. Climate impacts (especially later droughts linked to the 4.2 ka event) likely amplified existing environmental problems and played a role- though not necessarily the only one- in the culture’s end.

(Note: Modern climate and weathering- rain, temperature swings, salt, wind- continue to affect the exposed limestone temples today, which is why some sites have protective shelters.)

Map of Malta and its islands, including Gozo and Comino, highlighting various archaeological sites and locations.
Malta’s Neolithic Sites – ALL I NEED IS MY PASSPORT

The 4.2 ka event (also called the 4.2-kiloyear event) was a period of significant climatic aridification centered around 4,200 years before present (approximately 2200 BC). It is often described as lasting one to a few centuries (broadly placed between about 4.3 and 3.8 ka), involving prolonged drought conditions in many regions of the Northern Hemisphere, including parts of the Mediterranean.

Evidence from proxies such as pollen, lake levels, speleothems (cave deposits), sea- surface temperatures, and oxygen isotopes indicates drier conditions, particularly reduced precipitation, in the Mediterranean Basin.

Impacts varied regionally and seasonally (for example, some records suggest drier winters on top of already dry summers), and the event’s exact global coherence and severity remain debated. It has been linked to societal stresses or transitions elsewhere, such as the end of Egypt’s Old Kingdom and disruptions in Mesopotamia, though climate was rarely the sole cause.

Timing relative to the Maltese Temple Period

The Temple Period on Malta and Gozo began around 5.8 ka (roughly 3800 BC) and is conventionally seen as ending around 4.3- 4.2 ka (approximately 2300- 2200 BC). This places the end of the distinctive temple-building culture close to, or slightly overlapping with, the 4.2 ka event.

Key chronological details from archaeological and environmental studies (including radiocarbon modeling and paleoenvironmental cores) include:

Peak temple activity and relatively higher regional rainfall during the later Tarxien phase.

Decline in both precipitation and indicators of human activity beginning around 4.5 ka (centuries before the main phase of the 4.2 ka event).

Possible Thermi Ware phase (≈ 4.4- 4.2 ka) marking a transitional or final stage, sometimes associated with new influences.

Little archaeological evidence of activity on the islands between roughly 4.2 and 4.0 ka, raising the possibility of significant population reduction or near- abandonment, followed by the appearance of distinct Early Bronze Age cultures.

Role in the end of the Temple Period

Researchers have tested whether the 4.2 ka event caused or strongly contributed to the end of Malta’s Temple Period. A detailed study concludes that the event may have played a role, potentially acting as a final stressor (“coup de grâce”) on an already declining society, but that other factors likely played a larger or predominant part.

Supporting points:

  • Environmental records from Malta (pollen, molluscs, soils) show aridification trends and reduced cereal production aligning with declining activity from around 4.5 ka onward.
  • Prior human impacts (deforestation, soil erosion/exhaustion, overgrazing) had already stressed the small, resource- limited islands.
  • Chronological modeling indicates the society was already transforming or in decline before the peak of the 4.2 ka aridity.
  • Additional hypothesized factors include social changes, possible disease (e.g., plague), demographic pressure, or external contacts.

In short, the 4.2 ka event coincides with the final stages and apparent end of the Temple Period.

It likely intensified existing climatic drying and environmental degradation on the Maltese islands, contributing to reduced agricultural viability and societal stress, but it does not appear to have been a sudden, isolated cause of collapse on a previously stable culture.

The transition reflects the interaction of climate, long- term human landscape modification, and other social or demographic factors on a small and vulnerable archipelago.

Trump’s EPA Ends America’s War on CO2

On Monday in Houston, Environmental Protection Agency Administrator Lee Zeldin stood alongside Energy Secretary Chris Wright and Interior Secretary Doug Burgum at a G20 ministerial meeting on energy abundance and signed what may be the single most consequential act of environmental deregulation in American history.

The reaction from the climate establishment was as predictable as it was shrill. The green rag Guardian announced that Trump’s EPA had stripped itself of regulating ability, gutting the Clean Air Act in “a gift to planet polluters”.

Cartoon illustration depicting a celebration of the end of EPA regulations on carbon dioxide, featuring characters holding signs with various slogans, a cheerful carbon dioxide character breaking free from chains, and symbols of energy sources like wind and solar power in the background.

From Tilak´s Substack

By Tilak Doshi

On Monday in Houston, Environmental Protection Agency Administrator Lee Zeldin stood alongside Energy Secretary Chris Wright and Interior Secretary Doug Burgum at a G20 ministerial meeting on energy abundance and signed what may be the single most consequential act of environmental deregulation in American history. The final rule, formally the “Partial Repeal of the Carbon Pollution Standards for Fossil Fuel-Fired Electric Generating Units”, eviscerates the Biden administration’s 2024 mandate requiring coal- and gas-fired power plants to capture 90% of their carbon dioxide emissions or shut their doors. A companion proposal goes further still, moving to rescind the EPA’s underlying claim to authority to regulate greenhouse gases from power plants under the Clean Air Act altogether. It is an attempt not merely to repeal a rule but to permanently dismantle the legal scaffolding beneath the entire punitive regulatory edifice inspired by the Church of Climate.

The reaction from the climate establishment was as predictable as it was shrill. The green rag Guardian announced that Trump’s EPA had stripped itself of regulating ability, gutting the Clean Air Act in “a gift to planet polluters”. Environmental groups vowed immediate litigation, and the Clean Air Task Force branded the repeal unlawful. Sceptics will recognise the pattern by now: any retreat from Net Zero orthodoxy is met not with argument but with moral panic dressed up as science.

Undoing a fraudulent finding

To understand why Monday’s action matters so much, one has to trace the regulatory lineage back nearly two decades. In 2007, the US Supreme Court in Massachusetts v EPA ruled that greenhouse gases could, in principle, be treated as air pollutants under the Clean Air Act. The Obama EPA seized on that narrow opening in 2009 to issue what became known as the Endangerment Finding, the proposition that greenhouse gas emissions from new motor vehicles endanger public health and welfare. That single administrative finding, resting on computer models rather than observed harm, became the legal mechanism through which the entire American climate-regulatory apparatus was subsequently built: vehicle mileage mandates, methane restrictions on oil and gas wells, and, in 2024, the power-plant carbon-capture rule that is now being repealed.

Zeldin’s EPA had already struck at that foundation earlier this year, when it finalised the rescission of the 2009 Endangerment Finding itself in February, arguing that the agency lacks statutory authority under Section 202(a) of the Clean Air Act to regulate emissions on the basis of an imagined ‘climate crisis’ rather than demonstrable local harm. Power plants, the second-largest source of America’s greenhouse gas emissions after transportation, were always the next logical target. The courts’ “major questions doctrine”, which holds that agencies need clear congressional authorisation before regulating matters of major economic significance, cuts sharply against the sweeping powers the Obama and Biden EPAs assumed for themselves.

Monday’s rule is designed with that doctrine in mind, and the accompanying proposal is engineered so that no future administration can simply reinstate the old regime by regulatory fiat. Given that the entire edifice was erected on shaky legal and scientific foundations to begin with, its removal is wholly justified.

The scale of what is underway should not be understated. The power-plant rule is only one entry in a list of dozens of environmental regulations Zeldin targeted when he announced what his agency called the most consequential day of deregulation in American history back in early 2025: vehicle emissions standards, the ‘good neighbour’ rule governing cross-state pollution, environmental-justice offices and mercury restrictions have all been in his sights. Zeldin has been careful to stress that the Mercury and Air Toxics Standards themselves remain. The green lobby has been happy to blur this distinction in its rush to cast every rollback as an assault on breathable air. The distinction matters. It is a repeal of climate regulation built on a contested finding about global atmospheric effects, not a repeal of the conventional pollution controls for particulates, sulphur dioxide and mercury that the Clean Air Act was originally written to address and that have genuinely cleaned America’s air over half a century.

Line graph showing the decline of various pollutants from 1990 to 2023, including SOx, NOx, Mercury, Particulate Matter, and Ozone, with each pollutant represented by a different colored line.
Source: Based on data collated by Grok from EPA and EIA sources.

CO2: the gas of life, not a pollutant

What the hysteria over Monday’s announcement obscures is an elementary scientific point that carbon dioxide is not a pollutant. It is a trace gas, present in the atmosphere at a small fraction of one percent, and it is essential to photosynthesis, the biochemical process on which virtually all plant, and by extension all life on Earth depends. Dr Will Happer, the Princeton physicist and CO2 Coalition co-founder, has for years called carbon dioxide the gas of life, not as rhetorical flourish but as biochemical fact: plants cannot grow without it. Satellite records show the planet has measurably greened as CO2 concentrations have risen and crop yields have benefited accordingly.

The Endangerment Finding inverted this reality, transforming a trace gas integral to agricultural productivity into an object of state-sanctioned hostility. It asked Americans to believe that the same molecule enriching greenhouses to boost tomato yields is simultaneously an existential threat requiring the closure of the power plants that keep their lights on. The absurdity was never really about atmospheric physics. It is about political power, specifically the power to reorganise the American economy around the preferences of a green priesthood that has rarely had to answer for the cost of its prescriptions in higher electricity bills, deindustrialisation and diminished energy security. Zeldin’s EPA estimates that eliminating the power-plant carbon rule alone will remove more than $300 billion in compliance costs. That is the agency’s own figure, not an independent audit, and it deserves the same scrutiny any regulatory-impact estimate does. But even a fraction of that sum, redirected from compliance costs to reliable power generation, is a fraction worth having.

It is worth dwelling on the numbers that the climate alarmists prefer not to mention. Atmospheric carbon dioxide has risen from roughly 280 parts per million before the Industrial Revolution to something over 400 parts per million today, an increase that sounds dramatic until one recalls, as CO2 Coalition scientists routinely point out, that concentrations were several multiples higher for most of the planet’s geological history, when life was in no way endangered by it. The CO2 Coalition, of which more than 80 scientists and researchers are members, has argued for years that treating a two-hundredths-of-one-percent increase in a trace gas as the central threat to human civilisation inverts the actual risk ledger: energy poverty, not energy abundance, is what shortens lives and stunts economies. That is not a fringe position but reflects elementary plant physiology better than the vilification campaign the Obama and Biden EPAs built their anti-fossil fuels regulatory onslaught upon.

Houston and the energy counter-revolution

That Zeldin chose to make the announcement in Houston, at a G20 ministerial gathering explicitly billed around the theme of energy abundance, was no accident. It is the latest instalment in the broader Trump energy counter-revolution I have chronicled in these pages since the President’s inauguration. Delegations from China, India, Japan and Germany, alongside major oil producers, gathered in the same rooms where Zeldin, with Chris Wright and Doug Burgum, made their case that reliable, affordable energy, not emissions targets set by unelected bureaucrats, should be the organising principle of energy policy.

The announcement landed even as a war-disrupted oil market has pushed fuel prices higher across the country, a reminder that energy abundance and energy security are not abstractions but kitchen-table concerns for ordinary households. Surging electricity demand from data centres, artificial intelligence infrastructure and advanced manufacturing has made the reliability case for coal- and gas-fired baseload power more urgent, not less. This was a point industry groups were quick to make in welcoming Monday’s repeal as protection for grid reliability at precisely the moment America can least afford to lose it.

The Houston meeting’s guest list underscores just how far the old climate consensus has frayed as a diplomatic project. The talks brought together not only China, India, Japan and Germany but also Saudi Arabia, Canada and, notably, Russian officials attending a G20 energy forum for the first time since the invasion of Ukraine. A Venezuelan delegation was also invited amid Washington’s newly expanded stake in that country’s oil reserves. Whatever one makes of the geopolitics, the symbolism is unmistakable: the world’s major economies, energy producers and consumers alike are gathering under an American Presidency that has explicitly reframed the global energy conversation away from emissions targets and toward supply reliability and low cost. It is the same reorientation when Trump first returned to office promising an “energy dominance” agenda that would find enthusiastic support well beyond America’s shores among governments no longer willing to subordinate their energy security to the Brussels and Davos-style globalist climate agenda.

None of this will stop the green ideologues from fighting a rear-guard action in the courts, and it would be naïve to expect otherwise. But the wider context is instructive. Despite the IPCC’s quiet retirement of its most extreme warming RCP8.5 scenario, the climate establishment has refused to acknowledge the collapse of its own modelling premises. Rather than reassess, it doubles down, through litigation, through international bodies, through central-bank mandates dressed up as prudential risk management. Confronted with an EPA that has simply followed the statute and the underlying physics and economics of reliable energy supply, critics reach not for a rebuttal of the science but for the courts and the language of moral urgency.

Expect, too, the familiar coalition of blue-state attorneys general and legacy environmental groups to pursue litigation that has accompanied nearly every Trump-era rollback since the February rescission of the Endangerment Finding itself. Several states announced plans to sue within hours of the announcement. Some of that litigation may well succeed at the margins. The American legal system gives courts ample room to quibble over procedure even when the underlying policy judgment is sound. The argument that a trace atmospheric gas essential to plant life poses imminent danger to human life and justifies the reorganising of the entire American power grid rests more on speculative modelled projections than on measured harm.

A long-overdue correction

What Monday’s action represents, then, is not simply a rollback but a long-overdue correction. It is a recognition, 17 years late, that carbon dioxide was never the pollutant the 2009 Endangerment Finding pretended it to be. An economy built on affordable, reliable fossil-fuelled power is not a problem to be regulated away but the foundation on which American prosperity and the world’s energy security still rest. The gas of life has, for now, won a favourable hearing in Washington. Whether that verdict survives the inevitable litigation by Leftist-Democrat interests is a question for the courts. That it was ever seriously in doubt is a question for historians of the climate industrial complex that demonises as a poison a trace gas essential to life on Earth.

This article was first published in the Daily Sceptic https://dailysceptic.org/2026/09/18/trumps-epa-ends-americas-war-on-co2/

Dr Tilak K. Doshi is the Daily Sceptic‘s Energy Editor. He is an economist, a member of the CO₂ Coalition and a former contributor to Forbes. Follow him on Substack and X.