Mississippian
Osagean Series
Upper Burlington Formation
Monroe County, Missouri
Click on picture to Magnify
Burlington Crinoids
Top row: Uperocrinus pyriformis & Physetocrinus
ventricosus
Bottom Row: U. pyriformis - P. ventricosus
- P. ventricosus - U. pyriformis
This picture appeared on the October 2000 MAPS cover.
This display was found and
prepared by Carl Cook. It is one of the best crinoid displays that I have
ever seen.
Some have asked if these fossils were found separately.
The answer is no, however,
the U. pyriformis at the top can give that impression. I was
with Carl when he collected
the matrix and only 3 of the 6 crinoids were visible. Most of the matrix was
removed
exploring for other crinoids. The decission was made to leave the crinoids
in the same
orientation as they appeared in the matrix, including the U. pyriformis
at the top. Removing
the matrix from behind the crinoids makes for a unique and interesting presentation.
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Burlington
Formation
Mississippian Fossils
of Missouri