_ _________________________________________ Introduction _______________________________________ Purpose of the study____________________________ Acknowledgments. ______________________________ Character and extent of the Berea sandstone.______ Method of investigation. ________________________ Well records ___________________________________ A description of some of the more common terms used by the oiland gas-well drillers in the Appalachian basin_ ________________________________ Sand._____________________________________ Settling sand_______________________________ Lime_ _ ____________________________________ Shells, shale and shells, slate and shells, sand shells, or lime shells.______________________ Cave, pencil cave, and mules ear cave_________ Red rock __________________________________ Coffee shale._______________________________ Historical summary of the stratigraphic nomenclature ______________________________________ The age relation of the Bedford shale and Berea sandstone_ _________________________________ Correlations and stratigraphy._______________________ Upper Devonian rocks___________________________ Ohio shale _________________________________ Huron member_________________________ Cleveland member._____________________ Chattanooga shale__________________________ Chagrin shale ______________________________ Riceville shale______________________________ Mississippian rocks_____________________________ Surface correlations.________________________ Subsurface correlations ______________________ Cussewago sandstone______________________ General features._______________________ Relation of the Cussewago sandstone to Caster's Cobham conglomerate member of the Knapp formation_______________ Subsurface features (Murrysville sand)____ Bedford shale_ _____________________________ Exposures west and south of Berea, Ohio__ Exposures east of Berea, Ohio____________ Correlation of the Bedford shale._________ Subsurface. ____________________________ Berea sandstone ____________________________ Exposures west and south of Berea, Ohio_. Exposures east of Berea, Ohio.___________ Subsurface_____________________________ Relationship of Berea sand and Cussewago (Murrysville) sand in eastern Ohio and western Pennsylvania.___ Correlation of the Berea sand of southern Ohio, West Virginia, and Kentucky ___________________________ Correlation of Berea and Corry sandstones_____ Page
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