this post was submitted on 27 Oct 2023
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Roots of Mother Appalachia (mander.xyz)
submitted 2 years ago* (last edited 2 years ago) by fossilesque@mander.xyz to c/science_memes@mander.xyz
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https://www.cntraveler.com/story/appalachian-mountains-may-have-once-been-as-tall-as-the-himalayas

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[–] immuredanchorite@hexbear.net 8 points 2 years ago (3 children)

One thing that will never seem to leave my head is that I had read that the current mountain tops of the Appalachians are actually the original valleys of the mountain range. The mountains were so old and large that the valleys of todays Appalachian’s were the footprint of what was once maybe the largest mountain range earth has seen

[–] ElHexo@hexbear.net 4 points 2 years ago (1 children)

I think they were as tall as the Alps are now - because the crust essentially "floats" on the mantle as mountains are eroded (and glaciers slide off), the land gradually rises

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