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K, not C (was Re: Impact iridium (how much was there?))
At 03:11 PM 5/7/98 -0700, you wrote:
>>>> Earl Wood <email@example.com> wrote:
>> I would like to know if anyone has calculated the amount of Iridium
>> needed to cover the entire earths surface , at the depth
>> associated with the K C
>> boundary ?
>That should be K/T boundary, or even C/T (see Alvarez
>et al.'s 1980 paper...they write it "C/T").
Nope, sorry: Alvarez & company were in error. By international geological
convention, "K" is the formal symbol for the Cretaceous; "C" is the formal
symbol for the Carboniferous. (A "C" with a horizontal line through it is
the symbol for the Cambrian, incidentally).
Thomas R. Holtz, Jr.
Vertebrate Paleontologist Webpage: http://www.geol.umd.edu
Dept. of Geology Email:firstname.lastname@example.org
University of Maryland Phone:301-405-4084
College Park, MD 20742 Fax: 301-314-9661