192 
INDEX. 
Page. 
Burgettstown syncline, location and de¬ 
scription of. 41 
Butler Township, W. Va., detailed geology 
of.95-96 
Cable farm, well on. 102,106 
Cadiz quadrangle, convergence in.32-33 
wells in. 108 
Campbell, C. C., well of. 148 
Campbell, J. B., well of, log of. 107 
Cambridge limestone, character and distri¬ 
bution of. 80,96,98 
Candor dome, location and description of... 41 
Canton Township, Pa., detailed geology of. 154-157 
Cassiday farm, well on, log of. 106-107 
Chartiers Township, Pa., detailed geology 
of. 130-131,153-154 
Clay, origin of. 19 
Clay Township, W. Va., detailed geology of. 94-95 
Claysville anticline, location and description 
of. 54 
oil in. 59 
Claysville limestone, character and distribu¬ 
tion of. 78,157-158, 163,170 
position of. 49 
Claysville quadrangle, area and location of. 9,48 
bench marks in.. 186-189 
convergence in. 54-57 
plate showing. Pocket (PI. XII) 
• future development in...63-66 
gas field in. 02-63 
gas wells in, location of, map showing.. 
Pocket (PI. XIII) 
gas field in. 62-63 
geologic section (general) in. 67 
geology, detailed, of. 149—475 
geology, general, of. 48-66 
Gordon sand in, map of.. 
map of, discussion of. 57-66 
key horizons in. 49-50 
maps of. Pocket (Pis. X, XIII) 
oil pools in. 58-62 
oil sands in. 9 
oil wells in, location of, map showing. 
Pocket (PI. XIII) 
rocks of ...1 . 48-49 
structure of. 52-57 
map showing. Pocket (PI. X) 
topography of. 48 
wells in, sections of, plate showing. 52 
Coal, origin of. 19,20 
Cole, David, well of, log of. HI 
Cole, Thomas, well of, log of. 133 
Collier terrace, location and description of.. 29 
oil and gas in. 36 
Conemaugh formation, character and distri¬ 
bution of. 79-80,116,117,120 
Convergence, determination of_ 99-109,132-148 
explanation and mapping of. 23-25 
30-33,41-43,54-57 
maps showing.. Pocket (Pis. IV, VIII, XII) 
Cooper, C., well of. 100 
Cooper, II. C., well of, log of. HI 
Cow Run sand, occurrence of. . . 99 
Cowden, Mrs. John, well of, log of. 138 
Page. 
Cross Creek Township, Ohio, detailed geol¬ 
ogy of.91-92 
Cross Creek Township, Pa., detailed geology 
of.:. 124-127 
Cross Creek Township, W. Va., detailed 
geology of.96-98 
Cunningham, G., well of, log of. 112 
Cunningham, M. and E., well of, log of... 111-112 
Cuyahoga shale, character and distribution 
of. 84 
D. 
Dinsmore limestone, character and distribu¬ 
tion of. 69-70,121 
position of. 119,122,126,127,129,131 
use of, as key horizon. 38-39 
Donegal Township, Pa., detailed geology 
of. 163-165 
Donley limestone, character and distribu¬ 
tion of. 77 , 
154,158,164,166-168,170-171,173-174 
Dunbar, John, well of, log of. 145 
Dunkard coal, character and distribution 
of. 78,110,111 
position of. 134 
See also Lower Dunkard. 
E. 
East Finley Township, Pa., detailed geology 
of.'165-169 
Eastern Ohio Oil Co., well of. 104 
Edmondston, J. and J., well of, log of.107-108 
Elizabeth sand, occurrence of. 86 
F. 
Field work, character of. 22-23 
Fifth sand, character and distribution of... 86 
fluids in. 16,17 
gas in. 57,62 
oil in. 9,47,57,59,60-61,63-65 
position of. 45,117,124,130,135,139-141,145,147 
Fifty-foot sand, oil and gas in. 61,63 
position of. 138,146 
Findley Township, Pa., detailed geology of. 116 
Finley coal, character and distribution 
of. 80-81,88,90,95,96 
Finney syncline, location and description of. 53 
oil and gas in. 58,59,60,63-64 
Five Points pool, description of. 46 
Florence pool, description of. 46 
Formations, character and distribution of . 68-86 
Fourth sand, character and distribution 
of. 86,112 
fluids in.. 16,17 
gas in.57,62 
oilin . 9,57,59,60-61,63-65 
position of. 45,117,124,130,137,138,145,146 
Freeport coal, occurrence of. 110,112 
position of. 123,135,139,140,145,146 
G. 
Gantz sand, character and distribution of.. 85 
oil and gas in. 57,59,60-62 
position of. 137 
Gas, accumulation of. 15 
