(not entirely so!) The fault at the east side of the Horst continues to the south (and a little west) and probably causes the structural control on a valley there. It is probably this fault or the monocline flexture resulting from this fault that lowers the west end of the Wolfcamp fm. at the WCHs to a place under the Alluvium. The 2 main hills of the Horst seem to be separated by a fault although this may be an optical illusion on any part. The western hill is covered with Pinyon Pine and has more conglomerate apparently than the eastern hill. There however is what I take to be the top of the Wolfcamp fm. a considerable thickness of limestones and shales? (covered intervals) and this "non"clastic interval thins appreciably to the west along the western hill. The system of faults related to the intrusives seems to be quite complex. The intrusion in Hess Canyon is connected +- by sills, dikes and linearly scattered igneous bodies to the Iron Mt. Intrusion. One system of faults parallels this trend of igneous intrusions and the other. PG. 78 Fault system more or less parallels the south front of Hess Horst. 8/27/57/1 - 2 bags from dark gray limestone near windgap on crust of ridge just west of highest point in west hill of the Hess Horst. To the west the unit from which collection 8/27/57/1 was taken, forms the top of the Hill and becomes a dolostone. This seems to be the same dark gray dolostones as caps section 38, p. 69. 8/27/57/2 - silicified zone in same dark gray limestone, 100 yards west of collection 8/27/57/1. 8/27/57/3 - (not numbered) Calcarudite from west hill in Hess Horst. PG. 79 {note: illustration: W (active) | (stable) E near shore basin near shore marginal area calcarudite facies calcarudite and fine clastic facies} PG. 80 Received from C.O.Dunbar a number of samples and measured section - 2 samples not shown on the sections are: 7-5-2 from the double ledge forming limestone behind the Wolfcamp Hills and 7-5-3 from about 150' above this ledge. These samples came from localities just east of the 3 faults in the Hess visible from the east end of the Wolfcamp Hills. PG. 81