In the latitude of Dallas but to the over the Strawn thickens very rapidly to eastern Palo Pinto and then becomes humulated to east by eastern uplift and creeping away. Bean has plotted the various sections. Smithsonia under Palo Pinto thicken rapidly to east and is finally more than 500 feet thick. Some of the upper Marble Falls does goes over into shales. Under Fort Worth The Bend is all dale, and shale limestone see Grates and in Texas reports. Dear eastern side of Palo Pinto then zones of sandstone are introduced. In Brown Ct. Bean describes up to 20 feet thick of sandstone, some that I saw are fine sands another was coarse sand, and a third was cryptomatic. In the exposures of the San John area sands are not there in the Marble Falls limestone.