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RE: More data on dino extinction



> From: owner-dinosaur@usc.edu [mailto:owner-dinosaur@usc.edu]On Behalf Of
> Michael Sternberg
>
> from the GSA JUNE GEOLOGY
>
>
> Dinosaur abundance was not declining in a "3 m gap" at the top of the
> Hell Creek Formation, Montana and North Dakota
> Peter M. Sheehan, David E. Fastovsky, Claudia Barreto, Raymond G.
> Hoffmann
> Abstract: <http://www.geosociety.org/pubs/geology/0600geo.htm#S11>
> Full text PDF: ftp://204.144.241.6/pub/geology/28-523.pdf (77 kb)

Talk about beating a dead horse; haven't heard much about the "3 m gap"
since the late 1980s!!

However, the paper doesn't address an observed phenomenon (the apparent loss
of various lineages of western American dinosaur taxa during the
Maastrichtian), which is a separate issue from a decline in the uppermost
few meters of the latest Maastrichtian.

                Thomas R. Holtz, Jr.
                Vertebrate Paleontologist
Department of Geology           Director, Earth, Life & Time Program
University of Maryland          College Park Scholars
                College Park, MD  20742
http://www.geol.umd.edu/~tholtz/tholtz.htm
http://www.geol.umd.edu/~jmerck/eltsite
Phone:  301-405-4084    Email:  tholtz@geol.umd.edu
Fax (Geol):  301-314-9661       Fax (CPS-ELT): 301-314-7843