Phosphatic shale and adjacent subunits of Lake Neosho Shale
At the level of the broom handle is black Lake Neosho
brownish (iron stained) nodules and laminae of phosphate. It grades up
from the underlying dark gray blocky claystone (lumpy surface at
"business end" of broom), and above it is greenish gray bioclastic shale.
The Worland Limestone is at the top of the photograph.
to Technical Discussion