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Two separate extinctions brought end to dinosaur era ??



Dinosaur die out might have been second of two 
closely timed extinctions by Vince Stricherz, 
University of Wisconsin, September 5, 2012
http://www.washington.edu/news/2012/09/05/dinosaur-die-out-might-have-been-second-of-two-closely-timed-extinctions/

Two separate extinctions brought end to 
dinosaur era. NewScientist, August 3, 2012,
http://www.newscientist.com/article/dn22137-two-separate-extinctions-brought-end-to-dinosaur-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.sciencedirect.com/science/article/pii/S0031018212003847

best wishes,

Paul Heinrich
Baton Rouge, Louisiana