Measured By Condra and Upp (P. 65), Date 1931; Pearl shale,Hollenberg limestone, bedded, weaths yellowish, forms large flat blocks, fossiliferous,Shale--bluish-gray, red and gray. The top of this carries many calc concretions, and there is a poorly defined mudstone layer about 10 feet above base,Herington limestone,Limestone--cut by a few thin shale streaks, highly pitted, geodal, badly weathered,Limestone--buff, massive, geodal, pitting very characteristic,Ls--a seam, weathers slabby,Limestone--buff, massive, forms re-entrant, chalky with brown specks scattered throughout,Shale--olive green to mustard yellow, indurated, limy, fossiliferous,Mudstone--gray, fossiliferous,Paddock shale--olive green to gray, indurated, massive, blocky,Krider [...]