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Response to Jaime Headden's post of Tue, 20 Jan 2004 12:59:16.
"from what I just read in Phil Bigelow's posting, this is not
at all what he said, as the statement quoted ignores two important
qualifications, including the argument on "world-wide chron layers," and
the nature and reality of the K/T Ir layer, aspects that alter the meaning
of the quoted section."
Dear Jaime, let's have a gentlemans' agreement to agree that we
disagree on how to interpret Bigelow's statement.
"The idea of bio and geochrons is a relatively new one, and many
people have either been integral to understanding them, identifying them,
and utilizing them."
In fact--if I recall correctly, and someone please correct me if I do
not--the dual time-rock classification was originated by Schenck and
Muller some 60 years ago.
While at Stanford, I studied stratigraphy with Muller, and he was on
my Ph.D. committee.
The website "Commentary: Useage of Stratigraphic Terminology in
Papers, Illustrations, and Talks" at
http://www.agiweb.org/nacsn/JSP_commentary.htm cites Schenck and