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A comment on Africa 'witnessing birth of a new ocean' (2010). Parent comment

Re:Africa 'witnessing birth of a new ocean' (2010) by nugget on Thursday January 12, 2017 @02:32AM (#13380488)
How can a place be simultaneously 4k elevation and also "presently below sea level"? Are you saying that the introduction of sea water would rapidly erode 4k ft of surface material?
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Re:Africa 'witnessing birth of a new ocean' (2010) by tangus on Thursday January 12, 2017 @04:29AM (#13380978)
Yes, AIUI, he's saying bedrock is under sea level and is covered by 4000 ft of easily erodable material.
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Re:Africa 'witnessing birth of a new ocean' (2010) by delcaran on Thursday January 12, 2017 @02:51AM (#13380559)
No, he's saying that most valleys are above 4K, but some other valleys are below sea level.

But I also think he's wrong: as said in http://www.netstate.com/states/geography/mapcom/nv_mapscom.h..., I quote "[...] but the lowest point in Nevada is actually only 479 feet above sea level at the Colorado River at the southern end of the state." .

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