92 Collection 7/11/57/8 from the zone of #8 + #9 units in section 11. The LS have changed to Calcudites and much thinner. They seem to thin rather than being entirely truncated at Section 13. This collection is from a saddle on the N.W. side of the Ridge Section 13 is one. Collection 7/11/57/9 From Gaptank 1s, dark gray (uppermost Gaptank 1s) 2 bags, one softer calcide, one of dark LS. The stream gully on Brooks Ranch 1 mile west of Ranch House. Remark - It certainly isn't like P. King mapped it. 31 7/12/57 Sect. 31 Section 13b - Below unit 1 of section 13, there is an exposure of gray-brown shalw and orange sandstones. Whether this is a zone in the gaptank or the Illinoic Calcudites zone is the major concern. The field evidence (odate) would suggest to me it is a zone in the gaptank - (from a vertical distance, dip 10° to the N.) 1) LS, dark gray, organic fragmental, mostly brachiopods and crinoids - 25' 2) Covered 20' 3) LS, yellow weathering, dark gray fresh surface, organic fragmental - see collection 7/12/57/2 1' 4) Covered 12' 5) LS, black to dark gray, organic dark 1 1/2 ' 6) Covered 28' probably mostly of LS lith.