The limestone base that Lewis and Clark stand on is 387,000,000 years old.
Falls of the Ohio State Park is where a series of rapids formed by the relatively recent erosion of the Ohio River operating on 386 million-year-old Devonian hard limestone rock shelves.
شهد الكلمات | الموقع الإسلامي الثقافي العام
شهد الكلمات | الناريخ الإسلامي
11 February 2013
From:
ahmed amdouni
13 May 2012
From:
sa sasa
Jeffersonville, Indiana, US
Discovered by Lizzie Morrison
on 17 June 2008.
3993 views.