Wallop

Wallop

Originally shared by Tom Eigelsbach

U.S. Geological Survey scientists have determined water twice as salty as modern seawater trapped more than 1,000 meters (0.6 miles) deep under the Chesapeake Bay is 100-150 million years old. The ancient seawater was preserved like a prehistoric fly in amber, partly by the aid of the impact of a massive comet or meteorite that struck the area about 35 million years ago, creating Chesapeake Bay. The seawater trapped deep underground is now in an area roughly the size of a large lake — over 50 miles across.
http://news.nationalgeographic.com/news/2013/11/131120-oldest-seawater-chesapeake-bay-crater-science/

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