-138- Section 6 contd. Thickness (feet) 27. Limestone, light brown and light gray weathering, very silty; the two shades of silty limestone occur interlocked with each other, coarse sand and small cobbles are incorporated in this matrix as well as fragments of brachiopod and bryozoan shells . . . . . . . . . . . . . . . . 1 1/2 26. Covered, probably sandstone and siltstone . . 31 25. Calcarenite, light gray-brown weathering, both clastic and organic fragmental, 1 to 2 foot beds, lineation of small echinoid spines is N 70° E . . . . . . . . . . 12 24. Covered . . . . . . . . . . . . . . . . . . . . 14 23. Calcarenite, brown-gray weathering, clastic and organic fragmental, poorly sorted near base of beds but becomes well sorted and silicified near top of beds, beds 3 to 4 feet thick, k . . . . . . . . . . . . . . . 7 22. Sandstone, light brown weathering, very fine quartz sand, thin but uneven lamellae, two 3 inch calcarenite bands near middle . . 9 21. Calcarenite, gray weathering, much quartz sand, flat top beds with siliceous bands coll. 6-21A (at base), 6-21B (15 feet up) (1 inch) at top, 5 beds, A . . . . . . . . . . . 18