New U-Pb Dates Tie Deccan Traps to Dinosaur Extinction

New U-Pb Dates Tie Deccan Traps to Dinosaur Extinction

New Dates Tie Volcanic Flood to Dinosaur Extinction
by Becky Oskin, Live Science, December 11, 2014
http://www.livescience.com/49097-lava-flows-led-dinosaur-extinction.html

Did a Massive Volcanic Eruption in India kill off the
Dinosaurs? by Joel Achenbush, Washington Post,
http://www.washingtonpost.com/news/speaking-of-science/wp/2014/12/11/did-a-massive-volcanic-eruption-in-india-kill-off-the-dinosaurs/

The paper is:
Schoene, B., K. M. Samperton, M. P. Eddy, G.
Keller, T. Adatte, S. A. Bowring, S. F. R. Khadri
and B. Gertsch, 2014, U-Pb geochronology of the
Deccan Traps and relation to the end-Cretaceous
mass extinction. Science (advance online publication)
DOI: 10.1126/science.aaa0118
http://www.sciencemag.org/content/early/2014/12/10/science.aaa0118

A commentarty is:
Stone, R., 2014, The once-moribund idea that
volcanism helped kill off the dinosaurs gains new
credibility. Science. vol. 346, no. 6215, pp. 1281-1283
DOI: 10.1126/science.346.6215.1281
http://www.sciencemag.org/content/346/6215/1281.summary

Yours,

Paul H.

New Research Strengthens Asteroid Impact as Cause of Dinosaur Extinctions

New Research Strengthens Asteroid Impact as Cause of Dinosaur Extinctions

Fresh Clues In Dinosaur Whodunit Point To Asteroid
by Adam Cole, All Things Consdiered, February 7, 2013
http://www.npr.org/2013/02/07/171170142/fresh-clues-in-dinosaur-whodunit-point-to-asteroid

Asteroid Impact That Killed the Dinosaurs: New
Evidence. LiveScience.com, February 6, 2012
http://www.livescience.com/26933-chicxulub-cosmic-impact-dinosaurs.html

New Evidence Strengthens Argument That Dinosaurs
Died As Result of Asteroid Impact (New study says
cosmic impact, dinosaur extinction were 'synchronous
events') by Jason Koebler, US News,
http://www.usnews.com/news/articles/2013/02/07/new-evidence-strengthens-argument-that-dinosaurs-died-as-result-of-asteroid-impact

After the Dinosaurs Died This Furball Started the Next
Big Thing, Wired news, February 8, 2013
http://www.wired.com/wiredscience/2013/02/mammals-and-dinosaurs/

The papers are,

Palike, H. 2013, Impact and Extinction. Science.
vol. 339 no. 6120 pp. 655-656
http://www.sciencemag.org/content/339/6120/655.summary

Renne, P. R., a. L. Deino, F. J. Hilgen, K. F. Kuiper,
D. F. Mark, W. S. Mitchell III, L. E. Morgan, R. Mundil,
and J. Smit, 2013, Time Scales of Critical Events
Around the Cretaceous-Paleogene Boundary. Science.
vol. 339, no. 6120, pp,. 684-687.
http://www.sciencemag.org/content/339/6120/684.abstract

O'Leary, M. A., J. I. Bloch, J. J. Flynn, and many others, 2013,
The Placental Mammal Ancestor and the Post–K-Pg Radiation
of Placentals. Science. vol. 339, no. 6120, pp. 662-667
http://www.sciencemag.org/content/339/6120/662.abstract

Best wishes,

Paul H.

Two separate extinctions brought end to dinosaur era ??

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 H.

--

Asteroid Collision Doomed Dinosaurs

Paul bristolia at yahoo.com
Wed Sep 5 20:08:49 EDT 2007

Scientists implicate huge asteroid collision in death of
dinosaurs, San Francisco Chronicle, Sept. 5, 2007
http://www.sfgate.com/cgi-bin/article.cgi?f=/c/a/2007/09/05/MNVFRUVCK.DTL

Far-Flung Crash May Have Created Dino-Killer Asteroid
National Geographic, DC, Sept. 5, 2007
http://news.nationalgeographic.com/news/2007/09/070905-asteroid-crash.html

Space pile-up 'condemned dinos' BBC News, UK
http://news.bbc.co.uk/2/hi/science/nature/6980468.stm

Scientists find the dinosaur-killer, Globe and Mail
http://www.theglobeandmail.com/servlet/story/RTGAM.20070905.wasteroid0905/BNStory/Science/home

Yours,

Paul H.

"Extinction of the dinosaurs in North America"

Paul H bristolia at yahoo.com
Tue Mar 8 23:35:30 EST 2005

GSA TODAY Science Article:
The extinction of the dinosaurs in North America
http://www.eurekalert.org/pub_releases/2005-02/gsoa-mga022805.php

Fastovsky, D. E., and Sheehan, P. M., 2005, The
Extinction
of the Dinosaurs in North America. GSA Today. vol. 15,

no. 3, pp. 4-10. doi: 10.1130/1052-5173

http://www.gsajournals.org/gsaonline/?request=get-abstract&doi=10.1130%2F1052-5173(2005)15%3C4:TEOTDI%3E2.0.CO%3B2

http://www.gsajournals.org/gsaonline/?request=get-document&doi=10.1130%2F1052-5173(2005)15%3C4:TEOTDI%3E2.0.CO%3B2

"Did the dinosaurs really go abruptly extinct 65
million
years ago at the Cretaceous-Tertiary ("K-T") time
boundary, or was their K-T extinction the end result
of a gradual decline over millions of years? The
imperfect record available from scarce dinosaur
remains has made this question a true enigma
and the source of a long-standing and contentious
debate. David E. Fastovsky and Peter M. Sheehan
conclude, after a careful review of the fossil record
from the best-documented dinosaur sites (in
North America), that the extinction was indeed
geologically instantaneous. The authors argue
that the sudden die-off was different in scope
from previous fluctuations in dinosaur diversity
through the dinosaurs' 160 million years on Earth.
The authors consider the dinosaurs to have been
direct casualties of the K-T impact of an asteroid
with Earth and review several potential explanations
for the mechanism of the extinction. All of these are
concordant with the asteroid impact as the ultimate
cause."