{"id":472946,"date":"2026-09-22T04:05:21","date_gmt":"2026-09-22T11:05:21","guid":{"rendered":"https:\/\/climatescience.press\/?p=472946"},"modified":"2026-09-22T04:05:22","modified_gmt":"2026-09-22T11:05:22","slug":"ancient-himalayan-scale-mountains-buried-under-antarctica-helped-fuel-the-rise-of-complex-life","status":"publish","type":"post","link":"https:\/\/climatescience.press\/?p=472946","title":{"rendered":"Ancient Himalayan- Scale Mountains Buried Under Antarctica Helped Fuel the Rise of Complex Life"},"content":{"rendered":"\n
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AI generated by Grok<\/figcaption><\/figure>\n\n\n\n

Researchers Bei Chen (GFZ German Research Center for Geosciences) and Ian H. Campbell (Australian National University) studied microscopic zircon grains from marine sediments around Antarctica. These grains, eroded from ancient mountain roots now buried under ice, mostly date to 650- 450 million years ago, during the assembly of the supercontinent Gondwana (which included modern Antarctica, South America, Africa, Arabia, India, Australia, and Madagascar).<\/p>\n\n\n\n

Comparisons with global river- sediment data indicate many zircons originated deep in the roots of Himalayan- scale peaks. The authors describe the Gondwanan Super- mountains as \u201cthe largest ultra-high mountain network in Earth\u2019s history.\u201d<\/strong><\/p>\n\n\n\n

As these vast ranges eroded, they delivered large volumes of sediment and nutrients into the oceans. This is thought to have boosted photosynthetic microbes<\/strong> at the base of the food web, increasing oxygen production.<\/strong> Sediment from the mountains also helped bury organic carbon, preventing it from recombining with oxygen and thereby allowing atmospheric oxygen levels to rise.<\/p>\n\n\n\n

The researchers note that Earth\u2019s most dramatic evolutionary period (leading into the Cambrian explosion<\/strong>) coincides with this major episode of mountain building, and they consider the connection unlikely to be coincidental.<\/p>\n\n\n\n

The study is published in Earth and Planetary Science <\/em>Letters. It builds on earlier ideas about \u201csuper mountains\u201d<\/strong> influencing the evolution of life.<\/p>\n\n\n\n

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Gondwanan Super mountains<\/strong> (also called the Gondwana Super- mountains or linked to the earlier term Transgondwanan Super mountain) refer to an enormous network of Himalayan- scale mountain ranges that formed during the assembly of the supercontinent Gondwana roughly 650- 450 million years ago.<\/p>\n\n\n\n

These were among the largest ultra- high mountain systems in Earth\u2019s history. Estimates for the main Transgondwanan segment put it at over 8,000 km long and more than 1,000 km wide, roughly three to four times the length of today\u2019s Himalayas. They rose through major continental collisions as East and West Gondwana came together (involving blocks that now form parts of Antarctica, India, Australia, Africa\/Kalahari, Arabia, and related regions).<\/p>\n\n\n\n

A 2026 study by Bei Chen and Ian H. Campbell (published in Earth and Planetary Science Letters) used detrital zircon grains from Antarctic marine sediments to show that Antarctica\u2019s tectonics during this interval were dominated by such Himalayan- style mountains. <\/p>\n\n\n\n

Chemical signatures in many zircons point to deep crustal roots formed under extreme pressures. The authors describe the Gondwanan Supermountains as \u201cthe largest ultra- high mountain network in Earth\u2019s history\u201d<\/strong>, with remnants of those roots still lying beneath the East Antarctic Ice Sheet.<\/p>\n\n\n\n

As the ranges eroded (before land plants existed, so erosion rates were exceptionally high), they dumped vast quantities of sediment and nutrients (phosphorus, iron, etc.) into surrounding oceans. This is thought to have:<\/p>\n\n\n\n