When Glaciers Ruled Australia

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#glacier #australia #iceage
Uncover a forgotten chapter of Earth's history as we journey into the deep geological past to explore the remarkable story of when glaciers ruled Australia. This video takes you back hundreds of millions of years, to a time when vast ice sheets and valley glaciers spread across the ancient supercontinent of Gondwana, leaving behind a trail of clues etched into the Australian landscape. Long before the continent became known for its deserts, bushlands, and dry interior, much of it was blanketed by ice.

In this detailed and scientifically grounded documentary, we trace Australia’s glacial history through three major episodes. First, we explore the Late Paleozoic Ice Age, a massive global glaciation event during the Carboniferous–Permian periods (around 360–260 million years ago). Australia, then part of the southern polar regions of Gondwana, experienced widespread glaciation. Ice sheets flowed across what are now South Australia, Victoria, Tasmania, and Queensland, carving valleys and depositing thick sequences of tillites, striated pavements, dropstones, and glacial marine sediments. Key geological sites like Hallett Cove, Werribee Gorge, Bacchus Marsh, and Maria Island still preserve the physical evidence of these ancient ice flows, including scratch marks, chatter marks, and boulders dropped by icebergs into Permian seas.

We then move forward in time to the Pleistocene Epoch, when smaller alpine glaciers formed during the last 2.6 million years, particularly during cold phases such as the Last Glacial Maximum (~20,000 years ago). These glaciers were far more limited in size compared to their Paleozoic ancestors, but their effects are still clearly visible in places like Kosciuszko National Park in New South Wales and the Central Plateau of Tasmania. The video highlights classic glacial landforms such as cirques, tarns, moraines, and U-shaped valleys that tell the story of these more recent ice ages.

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OzGeology is an Australian-based YouTube channel that specializes in creating high-quality documentaries on Earth sciences and natural disasters. The content is designed to be easy to digest and covers a wide range of topics, not only focusing on geology but occasionally exploring other scientific areas as well.

00:00-00:32 - Introduction
00:33-04:22 - One of Australia's Most Intense Glaciations
04:23-08:25 - Australia's Glaciation During The Last Ice Age
08:26-09:48 - Conclusion & Patreon / YouTube Member Thank You!