Slab from calcareous shale subunit of Lake Neosho Shale

This slab of fissile calcareous shale from the base of the lake Neosho
was "dry sawn" without saw blade lubricant in order to keep it from
disintegrating, and it could not be polished. The mottling is probably a
result of modern weathering. Fossils are cream, very light yellow, and
grayish pink. The rock has split along a large shell in the upper right. The
arrow points to a shell that is oriented almost vertically. This indicates
either rapid deposition or bioturbation.

Technical Discussion

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