alexa Climate Change Can Tear Down Mountains

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Climate Change Can Tear Down Mountains

The St. Elias Mountains in Alaska are more than 5000 meters tall, testament to a tectonic plate wedged underneath the region that is driving them up like a snowplow. But the St. Elias range also contains some of the world’s largest glaciers, which inexhaustibly scour the mountains and dump sediment in the sea.

Now, a new study finds that the glaciers are winning, eroding the mountains faster than they are being built. Moreover, a jump in the region’s erosion rates about a million years ago coincides with a transition to more powerful ice ages—a sign that climate change can have a larger than expected effect in tearing down mountains.

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