Measured By M.K. Elias, 1935; Threemile,Flint top bench of Threemile Limestone,Speiser,Covered,Funston,Limestone with small algal nodules,Limestone, somewhat flaggy, with Murchissonia and small pelecypods,Limestone, shaly at the base, with Aviculopecten, Myalina and algal bisquits,Covered,Limestone, flaggy, coquinoid; Juresania and bryozoa at the top,Covered,Limestone, tough, laminated, with short and thin vertical canals,Covered,Blue Rapids,Limestone with small and medium sized algal bisquits,Covered, mostly greenish-gray shale,Limestone, platy,Shale, calcareous and platy,Shale, bright green,Crouse,Limestone, platy,Covered,Limestone,Covered,Limestone, tough, cavernous, with small gastropods and pelecypods,