Two Separate Extinctions Brought End To Dinosaur Era ?

[Oxytropidoceras]

Dinosaur die out might have been second of two

closely timed extinctions by Vince Stricherz,

University of Washington, September 5, 2012

http://www.washingto...ed-extinctions/

Two separate extinctions brought end to

dinosaur era. NewScientist, August 3, 2012,

http://www.newscient...nosaur-era.html

The paper is

Tobin, T. S., P. D. Ward, E. J. Steig, E. B. Olivero,

I. A. Hilburn, R. N. Mitchell, M. R. Diamond, T. D.

Raub, and J. L. Kirschvink, 2012, Extinction

patterns, δ18 O trends, and magnetostratigraphy

from a southern high-latitude Cretaceous–

Paleogene section: Links with Deccan volcanism.

Palaeogeography, Palaeoclimatology, Palaeoecology.

vol. 350–352, pp. 180–188.

http://www.sciencedi...031018212003847

Best wishes,

Paul H.

Edited September 6, 2012 by Oxytropidoceras

[Archimedes]

Nice articules thanks for posting

[Auspex]

I'm glad that someone is pursuing this line of research.

[Auspex]

And, I just noticed that Peter Ward is involved; excellent!

[siteseer]

I recall Gerta Keller talking about the double-extinction theory on a TV documentary several years ago. David Archibald has been skeptical of the meteor-only idea for years (see his 1996 book "Dinosaur Extinction and the End of an Era: What the Fossils Say). I was glad to see both credited.

And, I just noticed that Peter Ward is involved; excellent!

[Ludwigia]

Thanks for posting. I find the theory plausible and have been thinking along these lines also myself. The evidence for both events has been growing over the years.