North American ice sheets drove dramatic sea-level rise at the end of the last ice age
North American ice sheets drove dramatic sea-level rise at the end of the last ice age
7 months ago
tulane.edu
During the Ice Age, sea levels were 400 feet lower, creating land bridges, like the one between Alaska and Siberia, allowing early humans to migrate. Massive ice caps covering North America contributed to this sea-level drop, reshaping the Earth’s surface through a process called isostasy—where the weight of ice pushed land down, creating bulges elsewhere. This ancient geography played a pivotal role in human movement and settlement patterns. Full Episode: https://www.youtube.com/watch?v=Ld_PwMV
0:55
During the Ice Age, sea levels were 400 feet lower, creating land bridges, like the one between Alaska and Siberia, allowing early humans to migrate. Massive ice caps covering North America contributed to this sea-level drop, reshaping the Earth’s surface through a process called isostasy—where the weight of ice pushed land down, creating bulges elsewhere. This ancient geography played a pivotal role in human movement and settlement patterns. Full Episode: https://www.youtube.com/watch?v=Ld_PwMV
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Post–Ice Age sea level rose roughly 400 feet...enough to expand islands, but nowhere near enough to expose a continent-scale landmass in the Azores. Another factor matters: vertical crustal movement. Isostatic rise and subsidence radically change coastlines over time. Yet the moment this enters the discussion, the subject is dismissed. One of the most persistent ancient accounts is treated as taboo...not because it lacks data, but because it carries a name that triggers reflexive rejection. New
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