[gleeaikin]

Has there been any further information on Chaterjee’s(sp?) hypothesis that there was a much larger impact in the ocean off Mumbai (Bombay) around that time?

[X Fretensis]

You are referring to the Shiva impact structure. Whether this is an impact structure, 350 miles long and 250 miles wide, was caused by a rock 25 miles in diameter or some other geological events has yet to be settled.
The approximate age of the Shiva structure roughly coincides with the Chicxulube impact crater and the Deccan Traps volcanism. If it is accepted as a true impact crater, these events would be 1,2,3 knockout punch for the Dinosaurs.

[SunkenCiv]

Y’know, I think I’ve d/led this before, and wow, 40 page PDF, I plan to wimp out for now and see if there’s a wiki-wacky-pedia page about it. ;’)

http://www.depts.ttu.edu/gesc/fac_pages/yoshinobu/published_pdfs/chatterjee%2520et%2520al.%25202006.pdf

http://news.nationalgeographic.com/news/2009/10/091016-asteroid-impact-india-dinosaurs.html

Others not convinced, but that could be the murmur from [as Sheldon Cooper would say] the rock people; multiple impact event is just fine with me.

http://en.wikipedia.org/wiki/Shiva_crater