Later it dawned on me that the forms collected only from lower 20 feet of the Wolfcamp had but few of the species seen farther E. Those lower forms are all silicions in a sallowish creamy Li. All of the other Wolfcamp forms throughout J soft or Li, and maybe of a high range, is due to fault between the W place of the lower Wolf- camp, and the place of the free and better forms that have Rhachisferenia etc.2 Blanchard has it first for -----> Dec 1926. Apparently my 6'-8' Li on a basal empl. is not true base of the Wolfcamp as Blanchard interprets it; it goes on lower fm 167 ft and includes the hidden ammonite zone. The top of the Basalt and is a 24' bed of Li, beneath which are dominantly shales.