Barrowst at spot.colorado.edu
Thu May 10 19:33:00 EST 2001
From: Stephen B. DeVogel <devogel at colorado.edu> (Please reply to
I am seeking sediment samples containing fossil charophyte oogonia.
In particular, I am hoping to find a series of samples taken from a
core or from an outcrop of lacustrine sediments, which contain
oogonia. Often, a core will have a single oogonia-bearing stratum,
but this makes paleoclimate research difficult. Ideally, there would
be samples which cover most of the Holocene with an oogonia-rich
layer every 1000 years. I do not require an extreme abundance of
sample material, only about 15 or so well-preserved oogonia per
Currently, I am working toward my M.S. degree with Gifford Miller at
the University of Colorado. My experience is with amino acid
geochronology and paleothermometry. I intend to test the validity of
charophyte oogonia as paleoclimate indicators using amino acid
racemization data. A robust chronology between samples can be
established by calibrating amino acid geochronology with 14C dating.
And once I understand the biochemical kinetics of oogonia, I will be
able to calculate paleothermometry.
If you have any information concerning the availability of samples
for my research, please send messages to devogel at colorado.edu. Also
note that I will be in Australia from mid-June until mid-August this
winter in case you would like to meet.
Stephen B. DeVogel
INSTAAR and the Department of Geological Sciences
University of Colorado
Boulder, CO 80303
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