-214- Section 31 cont. percent of the rock, upper 1 foot is coarse organic fragmental . . . . . . . . . 15. Covered, dark red shale in part . . . . . . 14. Sandstone, orange to yellow-brown weathering, fine quartz sand, 3 to 6 inch beds . . . . . Gaptank Formation 13. Limestone, dark gray, organic fragmental, upper 3 feet in 8 to 12 inch beds, lower 9 feet massive, weathers to irregularly pitted smooth masses . . . . . . . . . . 12. Limestone, dark gray, 3 inch beds, very silt and clay rich in bedding planes, uneven bedding surfaces . . . . . . . . . 11. Limestone, dark gray, organic fragmental, blocks of cemented organic fragments common, 3 to 4 inches diameter, massive, coll. 31-11, Triticites beedei . . . 10. Covered . . . . . . . . . . . . . . . 9. Shale, brown-gray; and thin calcarenites, calcarenites become very fine pebble conglomerates in upper portion of the unit, badly covered . . . . . . . . . . 8. Limestone, dark gray, organic fragmental,