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Dinosaur
News
Chromium in K-T boundary supports Alvarez Asteroid Theory
October 30, 1998

New chemical evidence from Denmark and Spain lends further supports to the Alvarez Asteroid Theory. This theory posits that a tremendous collision between the Earth and an asteroid or comet led to great climactic changes on Earth and to an enormous mass extinction about 65 million years ago. This catastrophic event killed off the dinosaurs, ammonites, and many other animal and plant groups.

A new report in the current magazine "Science" states that this meteor collision 65 million years ago (the K-T, or Cretaceous-Tertiary boundary) produced the element chromium. This element is normally very rare, but is present in the K-T rock layer in relative overabundance.

This new chemical anomaly gives even more credence to the already popular Alvarez Theory, which is supported by other chemical anomalies and other strong evidence.

RELATED LINKS
More information on the Alvarez Asteroid Theory.

A page on the K-T extinction.

General information on extinctions.

Information on the Cretaceous period.

Chart of geological time


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