blocks, in parallel to main fault system. Just SW of Windmill, in line with the Sullivan Canyon fault, there is evidence of a fault - the NE side has black chert (Tenus or Dimple?) faulted against Wolfcamp? or Gaptank orange-brown sandstone. PG. 153 The amount of cover NE of the place section 20 was measured obscured the geologic relationships. I believe the conglomerate of the lower Wolfcamp is missing in part and pinches out completely over a couple of Haymond and Dimple (Wolfcampian) hills. The evidence is negative because what I believe is Gaptank sandstone (orange-brown) has no conglomerate cover. The Haymond clays and sandstones are exposed very close to the Hess sacchinella reef and no conglomerate is exposed typical of the lower Wolfcamp. These faults according to P.King's map line up fairly well with the 3 that flank the north end of Cathedral Mt. He maps the black chert as Ord. Marathon "V" unit. The orange-brown beds as Gaptank. They look much like some of the biohermal masses in the Uddenites zone, however. The Dimples cherts are present in great abundance in the conglomerate (see sample 8/1/57/8) which may represent the lower or basal portion of the Wolfcamp. PG. 154 Lenox Hills near Sullivan Ranch Road. P.King has mapped the Hess as being faulted about 50-75' down to NE with one fault. I believe there are several smaller faults parallel to the main one. I will sample from the section below the NE nob, but I believe the Leonard is faulted below the Hess at this point and the Leonard cliff forming limestone caps it. G.A. Cooper in the West Texas Permian guide books, 1957 mentions that it seems to be Leonard. PG. 155 8/2/57 Section 9 Section 21 - Sullivan Ranch Road at NE end of Lenox Hills. P.King called this interval Wolfcamp, I believe it is probably Hess. 0° dip for measurement. 1) Limestone, medium gray, more or less massive, forms lowest part of slope - 8/2/57/1. The lower 5' of this unit contains chert pebbles (fine) in well defined bedding band. Dev. and Ord. cherts. Upper 1' is orange-brown well sorted; total 34'. 2) Covered, 34'; patches of light brown siltstone and sandstone crop out here and there in this interval but no definite relationships were determined. In the upper 15' several biohermal rubble limestone appear to be present. 3) Medium to dark gray calcarenite; well sorted, upper 1/2" is dark siliceous rich. 1'. 4) Shale and siltstone, light brown 1'. 5) Limestone, gray with a tinge of brown. Biohermal rubble - Crinoid columns 2" or more diameter. 3" to 2' beds - total 3.5'.