Extremely salty water is at least 100 million years old | Science News

ADVERTISEMENT

SUPPORT SCIENCE NEWS

Science News is a nonprofit.

Help us keep you informed.


News

Extremely salty water is at least 100 million years old

Supersaline sediments off East Coast shed light on Atlantic Ocean’s early history

By
1:00pm, November 13, 2013

SALTY SEA  The Chesapeake Bay holds a pocket of high-salinity groundwater that has been undisturbed since the Early Cretaceous, at least 100 million years ago.

Water, water, everywhere and some of it’s been undisturbed for more than 100 million years.

 

Groundwater collected from sediments at the mouth of the Chesapeake Bay is thought to be 100 to 145 million years old. The ancient samples, twice as salty as modern seawater, were already trapped in sediments when an asteroid or comet landed in the area some 35 million years ago, researchers report in the Nov. 14 Nature.

 

Similarly salty waters in sediments off the Atlantic Coast of North Carolina, Georgia, Maryland and New Jersey could be just as old, but no one has sampled them carefully enough to find out, says Ward Sanford, a research hydrologist for the U.S. Geological Survey. Ten years ago, the USGS with the International Continental Scientific Drilling Program drilled a deep hole in the Chesapeake Bay impact crater to figure out how the 3-kilometer-wide asteroid strike had changed

This article is only available to Science News subscribers. Already a subscriber? Log in now. Or subscribe today for full access.

Get Science News headlines by e-mail.

More from Science News

From the Nature Index Paid Content