Measured By M.K. Elias, 1932; Shale,Mudstone,Shale,Carlton Limestone Member,Mudstone, buff, splittery,Sand Springs Shale Member,Shale, yellow-hued gray, somewhat limy,Shale, gray, somewhat sandy and micaceous, splittery,Hollenberg Limestone Member,Limestone, gray,Limestone, white, soft,Shale, green to dark-blue,Shale, calcareous,Limestone, light-gray, geodes, small pelecypods at the top,Pearl Shale Formation,Shale,"Boxwork",Covered,Shale, green, calcareous and splittery in upper and lower parts,Shale, green,Shale, maroon, in places changes to green in middle part,Shale, green,"Boxwork," green,Shale, light-green, banded, partly sandy and micaceous,Herington Shale Member,Mudstone, buff, splittery,Shale, gray,"Boxwork," yellow-hued gray,Limestone, [...]