Fossil assemblages in Big Draw. All are secondary - current laid deposits with possible exception of some of the clusters on the A sand. Even these have broken shells common. A sand:- Cardium dominant, Clisocolus (if that's what the big shell is) 2 subdominant. Both occur loose in sand as well as in clusters. Deutelinus also common. Oxytoma in local clusters. Scaphites have definite Luce Creek look to them. Got 2 fragmental ones. Only ammonoids found are in this sand. B sand:- Ophiomorpha more common than in A. Cardium present but Clisocolus rarely absent. Shell between A + B sands has large Nuculae; locally well preserved - a different sp. than in B sand. B sand has biggest terna. Toucedia in, also Vectra - neither seen in A. Abundant small Nucula. Shell bed top of B sand with oyster etc. is litter on surface of Cretaceous - Lisle canyon (Loc.3) indicator from SS C-6