[meteorite-list] Double Asteroid May Have Wiped out Dinosaurs

[Paul H.]

Double asteroid trouble may have wiped out dinosaurs
(The asteroid theory of dinosaur extinction gets a new 
twist as scientists look into what may have been a 
twin asteroid impact) by Amanda Kooser Feb. 4, 2013
http://news.cnet.com/8301-17938_105-57567486-1/double-asteroid-trouble-may-have-wiped-out-dinosaurs/

Dinosaur-killing asteroid was a twin terror by Colin Barras, 
New Scientist, February 2013
http://www.newscientist.com/article/dn23126-dinosaurkilling-asteroid-was-a-twin-terror.html

Research group suggests Chicxulub crater may have
 been caused by binary asteroids, Phys.org, Feb. 2013
http://phys.org/news/2013-02-group-chicxulub-crater-binary-asteroids.html

The paper is:

Miljkovic, K., G. S. Collins, S. Mannick, P. A. Bland, 2013,
Morphology and population of binary asteroid impact 
craters. Earth and Planetary Science Letters. vol. 363,
pp. 121–132. dx.doi.org/10.1016/j.epsl.2012.12.033
http://www.sciencedirect.com/science/article/pii/S0012821X12007194

A related paper is:

Bottke, H. J., and H. J. Melosh, 1996, Binary Asteroids 
and the Formation of Doublet Craters. Icaerus. 
vol. 124, pp. 372–391.  PDF file at:
http://www.boulder.swri.edu/~bottke/Reprints/Bottke_Binary_Icarus_1996.pdf

Yours,

Paul H.