CONTENTS. 
Chapter I.—General stratigraphy—Continued. Page. 
Formations below the Pittsburg coal—Continued. 
Rocks below the Pottsville formation—Continued. 
Gantz sand. 85 
Nineveh Thirty-foot sand. 85 
Gordon sand. 85 
Stray-stray sand. 86 
Fourth sand. 80 
Fifth sand. 80 
Chapter II.—Detailed geology of the Steubenville quadrangle. 87 
Knox Township, Jefferson County. Ohio. 87 
Island Creek Township, Jefferson County, Ohio. 89 
Cross Creek Township, Jefferson County, Ohio.. 91 
Steubenville Township, Jefferson County, Ohio. . 92 
Wells Township, Jefferson County, Ohio. 93 
Clay Township, Hancock County, W. Ya. 94 
Butler Township, Hancock County, W. Va./. 95 
Cross Creek and Buffalo townships, Brooke County, W. Ya. 96 
Chapter III.—Well logs used in making the Steubenville convergence sheet.. 99 
Wells in the Steubenville quadrangle. 99 
Wells in the Wellsville quadrangle. 107 
Wells in the Cadiz quadrangle. 108 
Wells in the Burgettstown quadrangle. 108 
Correlation of the Berea oil sand with sands in Pennsylvania. 109 
Chapter IV.—Detailed geology of the Burgettstown quadrangle. 114 
Hanover Township, Beaver County. 114 
Hanover Township. Washington County. 114 
Findley and North Fayette townships, Allegheny County. 116 
Robinson Township, Washington County. 116 
Smith Township, Washington County. 117 
Jefferson Township, Washington County.'.. 120 
Cross Creek and Independence townships, Washington County. 124 
Mount Pleasant Township, Washington County. 127 
Chartiers Township, Washington County. 130 
Chapter Y.—Well logs used in making the Burgettstown convergence sheet.. 132 
Chapter 'VI.—Detailed geology of the Claysville quadrangle. 149 
Independence Township, Washington County. 149 
Hopewell Township, Washington County. 151 
Chartiers and South Strabane townships, Washington County. 153 
Canton Township, Washington County. 154 
Buffalo Township, Washington County. 157 
Blaine Township, Washington County. 159 
Donegal Township, Washington County. 163 
East and West Finley townships, Washington County. 165 
North and South Franklin townships, Washington County. 170 
Morris townships, Washington and Greene counties. 172 
Appendix.‘... 176 
Index. 191 
