22. Tecumseh Shales. A stratum of shales about seventy-five feet in thickness, nearly non-fossiliferous, of fine texture, containing abundant ferruginous concretions and occasional layers of soft shaly sandstone. According to Bennett, these may represent the Kanwaka shales.[[4]]
23. Deer Creek Limestone.[[4]] Three layers of limestone separated by layers of shale. The total thickness of the formation is fifteen to twenty-five feet. The principal stratum is the uppermost, which is from seven to twelve feet thick. Most of the fossils below are collected from this upper layer. It is a massive, light gray limestone, tinged with yellow. The texture often varies much in a short distance, grading into inclusions or banks of blue argillaceous limestone in which the fossils are excellently preserved. It is best exposed at Calhoun’s Bluffs, in the cut of the Union Pacific railroad three miles northeast of Topeka.
Fusulina secalica (Say).
Lophophyllum profundum (Milne-Edwards and Haime) Foerste.
Archæocidaris agassizi Hall.
Oligoporus minutus Beede.
Crinoid stems.
Fenestella hexagonalis Rogers?
Fenestella sp.
Pinnatopora pyriformis Rogers.