-137- Section 6 contd. Thickness (feet) 38. Limestone, medium gray weathering, brown on fresh surface, very silty and sandy, many very small cephalopods, coll. 6-38. 1/2 37. Sandstone, like unit 35 8 36. Covered 5 35. Sandstone, light brown weathering, beds up to 1 inch thick, very fine quartz sand 23 34. Sandstone and siltstone, light brown to yellow brown weathering, very fine quartz sand; beds grade laterally into calcarenites and beds with calcite cement 8 33. Siltstone, light brown to gray-brown weather- ing, calcite cement 1/2 32. Covered 13 31. Limestone, light brown to gray-brown weathering, very silty and quartz sand common, 3 inch pebble conglomerate in part. 1/2 30. Sandstone, like unit 28 8 29. Limestone, dark gray weathering, clastic, mostly calcarenite but a few 1/4 inch dia- meter chert pebbles, 1/2 inch red-brown chert band forms upper surface 1/2 28. Sandstone, light brown weathering, very fine quartz sand 7