4 
CONTENTS. 
Page. 
Chapter III.—General geology of the Steubenville quadrangle—Continued. 
Discussion of conditions as shown by map of Berea sand Continued. 
Description of oil pools—Continued. 
Wintersville terrace. 35 
Gas wells not from the Berea sand. 35 
Gould and McIntyre pools. 36 
Collier terrace. 36 
Chapter IV.—General geology of the Burgettstown quadrangle. 37 
Description of surface.-. 37 
Location.. 
Topographic features..-. 37 
Geologic features showing at the surface. 37 
Section of rocks exposed. 37 
Key horizons and intervals. 38 
Probable errors in measurement of intervals. 39 
Structure. 40 
Geologic features below the surface. 41 
Convergence sheet. 41 
Oil and gas sands. ‘ 43 
Discussion of conditions as shown by map of Hundred-foot sand. 45 
Description of map.. 45 
Condition of saturation. 45 
Description of oil pools.. 46 
Five Points pool. 46 
Florence pool. 46 
Burgettstown pool. 46 
West Middletown syncline. 47 
McDonald' pool. 47 
Chapter V.—General geology of the Claysville quadrangle. 48 
Description of surface. 48 
Location. 48 
Topographic features. 48 
Geologic features showing at the surface. 48 
Section of rocks exposed. 48 
Key rock and intervals to important beds. 49 
Geologic features below the surface. 50 
Important horizons. 50 
Sections of subsurface rocks. 51 
Contour map of Upper Washington limestone. 52 < 
Washington anticline. 52 
Nineveh syncline. 53 
Finney syncline. 53 
Claysville anticline. 54 
West Middletown syncline. 54 
Convergence sheet. 54 
Discussion of conditions as shown by map of Gordon sand. 57 
Description of map. 57 
Structure of Gordon sand. 57 
Description of oil and gas pools. 58 
Washington-Taylorstown oil pool. 58 
Point Lookout oil pool. 61 
Buffalo gas field. 62 
Favorable locations for new productive territory. 63 
