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Re: Dinosaur National Monument

Work by USGS geologists Pete Petersen and Christine Turner in the late 1990s determined that the bones in the Carnegie Quarry were deposited on the channel floor in the deepest part of the channel and not on a point bar. Preliminary papers on the palynology by USGS paleontologist Ron Litwin claim some 250 species of plants are present in the Morrison, although that is for the entire formation and not DNM. All pollen sites are dominated by fern spores, regardless of the geographic or stratigraphic location of the sample. A gallery forest seems reasonable in or near the Carnegie Quarry as there are coalified logs, branches, and lots of coalified plant fragments in the present quarry face. The phenomenal abundance of unionoid clams in the quarry indicates that it was a perennial river and with low suspended sediment load most of the year.

Dan

Mark Hallett wrote:
Hi Tom, Thanks so much for the comment on my art, which at the time I did it for the National Park Service's Guide to the Dinosaur National Monument (1978) was the most current idea of what the DNM area looked like; several years ago I believe there were some stratographic and palynological studies that show a different interpretation (possibly more semiarid, and less tropical-looking "gallery forest", that may have been done by Forster or someone else. The original art was never produced a a poster, but I'd sure be interested in creating a newer and more accurate version if someone (or institution) wanted to do this. I'll be happy to send you digitals of the dino work I offer for sale, and if you're interested just let me know. Happy Holidays, Mark 


--- On Thu, 11/27/08, Tom Johnson <tdjohnson51@msn.com> wrote:

From: Tom Johnson <tdjohnson51@msn.com>
Subject: Dinosaur National Monument
To: marksabercat@yahoo.com
Cc: tdjohnson51@msn.com
Date: Thursday, November 27, 2008, 10:27 AM
Mark, Happy Thanksgiving!
There is a wonderful painting you did of a panoramic view
of the Jurassic landscape around Dinosaur National Monument,
which I have only seen in Dinosaurs Past & Present. I'd
love to find this in the form of a print or poster, but have
been unable to locate it on the web. Where would I look to
find reproductions of your work?
Best wishes,
Tom Johnson
Loveland, Colorado


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