"The Chattanooga shale crops out on the steep slope between the Nashville basin and the surrounding Righland Rim, and on many high hills within the basin in Tennessee. Outside the basin the black shale sequence is exposed in several river valleys and around tbe large Lexington Basin of Kentucky, Ohio, and lndiana. It also crops out along the ridges and valleys of the folded Appalachians in Tennessee, Georgia, and Alabama. lnformation is presented on the stratigraphy, composition, structure, paleography, and origin of the Chattanooga shale. Its relationship to the underlying and overlying formations is discussed. (C.H.)"