Oldest large body of ancient seawater identified under Chesapeake Bay
Thursday, November 21, 2013 - 12:30
in Earth & Climate
USGS scientists have determined that high-salinity groundwater found more than 1,000 meters (0.6 mi.) deep under the Chesapeake Bay is actually remnant water from the Early Cretaceous North Atlantic Sea and is probably 100-145 million years old. This is the oldest sizeable body of seawater to be identified worldwide.