Base Black Shale, Little Cub Creek. 591 Friday, 21 July '99. 10. View of Clinton rock exposure. Just below the mouth of Little Cub Creek. Dip N 68 E, in this long exposure nearest the mouth of the creek. Dip N 22 E near west end of exposure. D mr stream in West bank the dip is southwest; precise direction of dip is unknown. Section of view just below Little Cub Creek. Instead of following section take one below. 19 ft. of blue siliceous limestone, weathering rusty brown. 19 ft + Madison bed, clayey calcareous rock, very much like beds in Marlow Co., &c. Section of view just below Little Cub Creek, Black Shale 7 ft probably all greenish clayey shale 2 ft of layered limestone layers over 2 ft 6 in. of green clayey shale 3 ft 4 in. Ozogrod limestone. 15 ft 8 in. Clinton limestone 19 ft. Madison. Notes on above section. The entire thickness of continuous limestone layers is 19 ft, but the base of layer with many large round beads and Multifolia cylindrica 3 ft 4 in below the top, hence the sum of top section considered Ozogrod. On this lies clay shale, thin layered limestone; there are well exposed at mouth of Little Cub Creek. Above this there is less continuous exposure; greenish clay shale is exposed at various levels, and 1 foot of this clay shale occurs just beneath the black shale as indicated in the section just described. This makes the thickness of the total Ozogrod about 17 feet. Clinton 15 feet 8 in. Madison 19 feet. Dip seems to continue southwest as far as Norman's Landing, About 2 mile east of Norman's Landing the layer marked I seems to occur at water's edge, at any rate it is the dark blue clayey Marbury shale, and over it lies a thin limestone ledge with good Spirifers &c, and above this plenty of additional clayey shale. Beyond all question, there is no Lower Silurian, Clinton, Ozogrod Black Shale here, nor is there any grey layer Marbury. This indicates the existence of an anticlinal axis along the south rim edge of the river course. Rained nearly all day.