Limestone Pool, Rose Hill B.O main lim. Touch the Potomac R. Here are shown no less than 175 feet of Tintaculite limestone. Have a few fossils. Tentaculites, Ostracoda and a smuss Cheristella. Also a Petgric near Gibron. Mostly these are in the upper thus although the Cheristella goes through. The Tentaculite is rare here and now found only in one bed about one third from the HP. This section shows with the top are the bottom. The thickness of the entire L. fd. could not be be made out but it can hardly be less than 1000 feet. L.fd. Lower are the N.J. horizons and the trisely gone I Port Jersey but not the Lower Potomac. This horizon does not appear to come to the