Lake Neosho Shale grading upward into Worland Limestone

At this spot, bioclastic shale at the top of the Lake Neosho Shale
(bracket) seems to grade both vertically and laterally (to the left)
into grainy, light greenish gray bioclastic limestone at the base of
the Worland Limestone. Crinoid debris dominates the skeletal
fraction. Brachiopods are second, with a variety of organisms
making up the remainder. The bioclastic shale contains numerous
lenticular bodies of relatively pure skeletal micritic limestone,
some of which may be clasts (see polished slab). These stand
out in relief at this exposure.

View polished slab

Return to Technical Discussion

Main Menu