Geology is usually so intuitive, it's rare to find something that goes against your instincts. But isostatic rebound creates a moment of exactly that: the more landlocked glaciers melt, the lower the local sea levels drop. Here's how.

Jacobsen Glacier is one of the few remaining chunks of ice from the vast Cordilleran ice fields that covered British Columbia thousands of years ago. Image credit: Dru!

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