mapped in the Pueblo and Welsenburg tulios. (On history of separation) The formation takes its name from Purgatoire canyon in the Mesa de Maya quadrangle. Goes on with page of detailed description that shows some difference with Glencirrn-Little sequence, but gets what appears to be Glencirrn cgl. with fish remains in it. Possibly one section would help tie this in. Cloverly - See Wilmerth. (Original description by Darton 1904) in G.S.A. Bull. vol. 15, pp. 394-401) SEE CARD FILE See also Greybull sandstone member 14 Wilmerth. This is probably the basal Glencirrn sandstone. 69