Skip to Main Content
Skip Nav Destination

A deep-sea core from the Caribbean contains a layer of sediment highly enriched in meteoritic iridium. This layer underlies a precisely deated (34.4 m.y.) layer of North American microtektites and coincides with the extinction of five major species of radiolaria. A causal relationship is strongly suggested: a massive (⩾3 km, ⩾50 billion ton), chemically undifferentiated meteorite collided with the earth, produced the tektites, and led to worldwide extinctions 34 m.y. ago.

You do not have access to this content, please speak to your institutional administrator if you feel you should have access.

Figures & Tables




Citing Books via

Related Articles
Related Book Content
Close Modal

or Create an Account

Close Modal
Close Modal