Pachlocrinus aequalais Cladid Crinoid from Crawfordsville
Cladida; Pachlocrinus aequalais
Mississippian Osagean Stage (345 m.y.a)
mm = 1 inch): Crown: 28 mm long by 15 mm wide with a 20 mm stem on a 78
by 50 mm matrix
example of an Inadunate crinoid Pachylocrinus aequalis of the Family
Pachylocrinidae. The crinoid is very three-dimensional in aspect,
with the excellent preservation typical of the Crawfordsville region.
In order for such articulated specimens to be preserved, they had
to be buried rapidly, presumably by turbidity flows which overcame
them. This is a fine example of the variety of diverse crinoids
to be found in the Crawfordsville deposits.
crinoid pictures to enlarge