SETI bioastro: Candidate Crater For Permian-Triassic Extinction Event Found

From: Larry Klaes (lklaes@bbn.com)
Date: Thu Apr 20 2000 - 10:38:47 PDT


Date: Thu, 20 Apr 2000 10:26:56 -0700 (PDT)
From: baalke@jpl.nasa.gov
Subject: Candidate Crater For Permian-Triassic Extinction Event Found
Reply-To: neo-owner@www.jpl.nasa.gov
To: undisclosed-recipients:;

Killer Crater Found
By Larry O'Hanlon,
Discovery.com News

April 19, 2000 -- Australian geologists have discovered the buried remains
of an 80-mile wide impact crater that could be the culprit behind the worst
extinction catastrophe in Earth's history.

Geologists detected the crater through smashed mineral grains and magnetic
and gravity measurements of the region around the town of Woodleigh, near
Shark Bay on Australia's west coast.

Although no precise age for the crater -- the fourth largest in the world --
has been determined yet, it appears to be 250-360 million years old, making
it a possible source for the massive Permian-Triassic extinction event that
wiped out almost all life on the planet 250 million years ago.

Full story here:

http://www.discovery.com/news/briefs/20000419/geology_crater.html



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