4.) 18.5 As above, from 5 to 8 feet above base large rusty to red brown irregularly tabular concretions also with scatt. Tenucredia a few Ophiomorpha in but not abundant in lower 13 feet. In this lower part clusters of Ortozys? (AT-647) some Tenucredia with both valves, a few scattered Penope in living position (Coll. A4664) in upper 5.5 ft massive bedding gives way to current tabular Xlam with much O. and current lags of To shells. 5.) 15.5 Sand, weathers light yellowish orange, is fine grained - similar to that in interval (4), but has abundance of Ophiomorpha in rusty fest, and a very few scattered Tenucredia, many orange Fe chips and partings. Concentration of Tenucredia at top of unit 4 marks end of all but a few scattered valves, but no apparent change in lithology 6.) 1.0+ Shell, Db gray to czubanaceous, soapy with some layers greenish sand and scatt. cone-in-cone concretion. Prob. a benthonic shell 7.) 1.1 Sand, massive greenish yellow to ochre-stained bed fg ss