ALLEGHENY SERIES IN COLUMBIANA AND MAHONING COUNTIES, OHIO PART I. STRATIGRAPHY AND CORRELATION OF THE COALS AND

The general stratigraphic section and many of the details of the geology of Columbiana and Mahoning Counties are known from the published reports of Newberry, Orton, Stout and Lamborn, and others. As time goes on, however, new data that add to the already existing store of geologic knowledge or that necessitate some minor revision of the present correlation of the various strata.are discovered. Some years ago I began the study of the invertebrate fossils of the Allegheny Series in that portion of these two counties within the Lisbon Quadrangle, and as the study has progressed some new facts concerning the stratigraphy have been found. It is proposed to present this new information in three separate parts under the general title given above (see Fig. 1)