-164- Section 12 contd. Thickness (feet) limestone beds . . . . . . . . more than 150 Covered below Section 13 Measured about one mile southwest of the Hess ranch house and just north of the east-west fence which crosses the eastern face of Leonard Mountain. This section begins at the top of an igneous intrusion and stops in the Lenoxhills con- glomerate. Top of section Thickness (feet) Lenoxhills Formation 4. Calcirudite and calcarenite, dark gray; sand matrix, orange-brown, top of unit badly covered . . . . . . . . . . . more than 25 Gaptank Formation 3. Limestone, black, with orange cement, interbedded gray shale, 4 inch to 1 foot beds . . . . . . . . . . . . . . . . . 20 2. Shale, gray, with two thin organic fragmental limestones in upper half of unit, coll. 13-2B (near top), Triticites milleri,