INDEX 
A. Page. 
Alexandria Brick Company, plant of 129 
Allegheny formation, coals in 116-117 
occurrence and description of 11,23-25 
oil and gas sands in 49,50 
sections of 24 
water in 134 
Allison mine, coal oi, section of 93 
Amity anticline, location and description of. 40-41 
Amity gas field, location and description of. 44 
Amwell Township, wells in, records of 70-71 
Anticlinal theory of oil and gas 62-63 
Ashurst's (P.) bank, coal of, analysis of . .. 97 
B. 
Barre No. 1 well, data on 46 
Barren Measures, occurrence of 12,20 
Bayard sand, correlation of 49 
depth to 70-87 
gas from 70, 72, 82, 86 
occurrence and aescription of 32,58 
Beallsville, Borough ol, wells in, records of. 70-71 
Bedell (William) well, record of 33-35 
Bellevernon anticline, location and aescrip- 
tion of 38-39 
Bench marks, location of 139 
Bentleyville, Borough of, wells in, records of 70-71 
Benwood limestone, analysis oi 121 
occurrence and description of 119-121 
section of 120 
waterfall, over, view of 120 
Berea sand, correlation of 49, 52 
Bibliography of quadrangle 140 
Big Dunkard sand, correlation of 49 
occurrence and description of 50 
Big Injun sand, correlation of 28,49 
depth to 51,70-87 
gas from 86 
occurrence and description of 29,50-52 
oil from 60,82 
wells to 46 
Big lime, correlation of 25,49 
depth to; 70-87 
description of 27 
persistency of 11 
Bissell, sections at and near 16,92, 1 18 
Blanche mine, coal from, analysis of 96 
coai of, section of 94 
Bluff sand, correlation of 49 
Boon mine, section of 94 
Burgoon sandstone, correlation of. 28,29,49,50-51 
Butler County sand, correlation of 49,52 
C. 
Cameron No. 1 well, data on 46 
Canonsburg, limestone near, analyses of . . . 121 
Canonsburg oil field, development in 45 
Page. 
Canonsburg triangulation station, location 
of 135-136 
Carboniferous rocks, occurrence and de- 
scriptions of 11-30 
section of, figure showing 20 
Carnegie Natural Gas Company, operations 
of 47 
Catskill beds, occurrence and description of. 31-32 
Center Township, section in 13 
Chartiers Creek, oil storage on 10-1 1 
Chartiers Township, wells in, records of 70-71 
Chemung formation, occurrence and de- 
scription of 11,30-32 
oil and gas sands in 49, 55 
sections of 31 
Citizens Natural Gas Company, develop- 
ment by 45 
Clarion sandstone. See Kittanning sand- 
stone. 
Clay, occurrence and description of 129-130 
Claysville triangulation station, location of. 137 
Coal, occurrence and description of 88-117 
topography and importance of 10 
Conemaugh formation, coals in 116 
occurrence and description of 11, 20-23 
oil and gas sands in 49-50 
sections of 21-23 
water in 134 
Connellsville coal, correlation of 49 
Contours, structure, explanation of 36-38 
Creeks, description of 130 
water of, use of 131 
Crumrine (A. B.) well No. 1 (24), record of. 24,26 
section of, figure showing 22 
Crumrine (William) well No. 1, section of, 
figure showing 22 
D. 
Davis (Matilda) well No. 2 (29), data on, 
record of 21-22 
section of, figure showing 22 
De Wolf F. W., work of 9 
Deemston, Borough of, wells in, records of. 70-73 
Devonian rocks, occurrence and description 
of 11,30-36 
Drainage, surface, description of 130-131 
Dunkard group, limestones in 121-128 
occurrence and deccription of 11-15 
Dunkard sands, correlation of 21, 49 
occurrence and description of 49-50 
E. 
East Bethlehem Township, wells in, records 
of 72-73 
Elizabeth sand, correlation of 49 
depth to 58, 70,78 
141 
