Frank (Cocky Avian Theropod) Bliss MS Biostratigraphy Weston, Wyoming www.cattleranch.org
45.783664% of all statistics are made up at the time
On Sep 3, 2006, at 9:35 AM, Jeff Hecht wrote:
At 2:25 AM +0000 9/3/06, Phillip Bigelow wrote:On Sat, 02 Sep 2006 22:12:53 -0700 (PDT) don ohmes <d_ohmes@yahoo.com>
writes:At risk of getting on thin crust--
1). 65 my is old for deep ocean crust. Might be hard to find some that was in the antipodal location at the time. Stuff can move fast, like 10cm/a. That is 6500km since KT, IMMC. Might, in fact, be all subducted.
Regarding the sea floor around India, you might be right. [I am a neophyte when it comes to southern Asian tectonics]. But there are numerous places in today's Pacific Ocean that still contain 65 my old oceanic crust.
According to http://userpage.fu-berlin.de/~data/database/oceanage/ jgr_paper.html there is some Cretaceous sea-floor crust off the east coast of India and the west coast of Australia. The actual antipodes from the KT impact may have been subducted by now, but I would expect whatever splashed down to have been spread over a significant area. So there's hope for finding something, but it may take some work.
-- Jeff Hecht, science & technology writer jeff@jeffhecht.com http://www.jhecht.net Boston Correspondent: New Scientist magazine 525 Auburn St., Auburndale, MA 02466 USA v. 617-965-3834; fax 617-332-4760