Printer Friendly

Taking a yardstick to a killer crater.

Hidden beneath the surface of Mexico's Yucatan Peninsula lies the giant Chicxulub crater, carved by a comet or meteorite that smacked Earth silly 65 million years ago. Geologists originally estimated the diameter of the crater as 180 kilometers, but a 1993 study indicated that the structure stretched 300 km across, making it one of the largest craters in the solar system (SN: 4/3/93, p. 212). Not so, report Alan R. Hildebrand of the Geological Survey of Canada and his colleagues in the Aug. 3 Nature. The group asserts that new gravity measurements made over the crater fix its size at 180 km, still one of the largest on Earth. The pattern of sinkhole lakes at the surface, which follows the crater's outer rim, also supports this smaller diameter.
COPYRIGHT 1995 Science Service, Inc.
No portion of this article can be reproduced without the express written permission from the copyright holder.
Copyright 1995, Gale Group. All rights reserved. Gale Group is a Thomson Corporation Company.

Article Details
Printer friendly Cite/link Email Feedback
Title Annotation:new gravity measurements show that the Chicxulub crater on the Yucatan Peninsula is 180 kilometers across, one of the largest on Earth
Publication:Science News
Article Type:Brief Article
Date:Aug 19, 1995
Previous Article:Polar sea ice on the wane.
Next Article:Bering glacier on the run again.

Related Articles
... But what about the Yucatan?
Closing in on the killer.
Giant crater linked to mass extinction.
A buried Iowa crater finally comes of age.
Large meteorite scar identified in Virginia.
Diamonds from outer space.
Ancient arctic splashdown.
Craters and extinctions: time of reckoning.
The great crater caper.
Getting to the core of a killer crater.

Terms of use | Copyright © 2016 Farlex, Inc. | Feedback | For webmasters