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[margin circled 47]
C-2 feet of hrackly or mealy 
ls simply packed with
Renesselandia - long slender ones
in lower 3/4 but large missouriensis types in upper part = 6693 B
C - Dove ls with nodules 
of lime + shale partings - bed
very irregular in thickness
Shale seam at top.
E - Dove ls Dev. or Miss.

Found a pocket of black shale under the Rensselandia bed which I suspect is
Pennsylvania.  Similar black
shale was seen filling cavities in The Burlington.
I suspect therefore that the black shale is a cavern filling occupying any level in the limestone.  Black shale = 6693D
In margin from top to bottom is:
[[Crinoids = 6693C]]
[[Dove ls]][[E]]
[[10']] [[D]]
[[6693B 2']] [[C]]
[[12']] [[B]]
[[6693A 5' or 6']] [[A]]