Chicxulub Extinct? -- AMIGA Astronomy

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Subject: Chicxulub Extinct?

Author:
Blobrana

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Date Posted: 00:18:42 03/02/04 Tue

The theory that a single, massive asteroid strike killed off the dinosaurs 65 million years ago may itself become extinct...

New data suggests the Chicxulub crater in Mexico, created by the collision, predates the extinction of the dinosaurs by about 300,000 years.
Data was derived from analysed rock-core, using five separate indicators of age, including fossil planktonic organisms and patterns of reversals in the Earth's magnetic field.
The cooling of the global climate shortly followed by a period of greenhouse warming placed enormous stress on the dinosaurs.

This warming could have been kicked off by carbon dioxide released by a massive eruption of lava from the Deccan traps in India.

The Chicxulub impact occurred during this warming period and, although the environmental effects were severe, it did not cause the extinction of the dinosaurs.

Perhaps, a second impact (beneath the Indian Ocean?), 300,000 years after the Chicxulub collision, may have finished off the creatures...

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