AIN 50-44 1 Old opening in upper Glencairn bed. At south end about 3.5 ft of clay including 0.3 bentonite at base. To north roof raises and cut (and presumably clay) is 10' thick. Altitude on rock under bentonite N.20 W. 75° E. 2 Johnson mine of the Denver Sewer pipe Co. 3 Section of upper Glencairn clay exposed in old cut 5,7 Sandstone, fine grained, thin bedded beds to 0.6 with intercalated thin layers of shales, siltst., & silty shale. 0.1 to 1.6 Gray clay finely silty, to silty with some argillaceous siltstone 2,2 Siltstone, argillaceous, blocky, gray with streaks of clay about 0.4 in its top 1.0 from base. This clay while gray, appears to be botanitic. Fractures weather yellow and fresh surface soapy. 2,6 Sandstone, fine grained, in beds up to 0.8 with silty & shaly partings, ripples 1,7 Interbedded silty claystone and siltstone as above local thin bed ss in mid part. 1,8 Sandstone, fine grained clay, 1,0 clay, dk gray silty clay