INDEX. 
193 
Page. 
Sas, occurrence of. 35-36, 44 
occurrence of, theory of. 11-21 
Gas fields, description of. 35-36,62-63 
distribution of, plate showing. 26 
Gas sand, correlation of. 44 
occurrence of. 44,112 
Gas sands, occurrence of.3,5-36,44 
See also Sandstones, oil and gas bearing. 
Gas wells, location and description of.35-36 
location of, map showing. 
Pocket (Pis. VI, IX, XIII) 
Geology, detailed description of. 87 
general description of. 26-66 
section of. 66 
Georges Run, section of. 157 
jiillespie dome, location and description of . 41 
3ood Intent, section near. 169 
Jordon sand, character and distribution of. 85-86, 
112 
gas in.57,62 
map of. Pocket (PI. XIII) 
discussion of.57-66 
oil in. 9,45,47,57,59-61,63 
position of. 45, 
57,117,124,130,137-141,143,146,147 
map showing. Pocket (PI. XIII) 
structure of.57-58 
map showing. Pocket (PI. XIII) 
Gordon Stray sand, occurrence of.86,112 
oil and gas in. 57,60-61,64 
position of. 45,138 
Gould pool, description of. 36 
Great limestone. See Benwood limestone. 
Greene County, Pa., detailed geology in.. 172-175 
Greene formation, character and distribu¬ 
tion of. 76-79,163,166 
Gregg, Levi, well of, record of. 146 
Griswold, W. T., work of. 10 
H. 
Hancock County, W. Va., detailed goelogy 
of.94-96 
Hanover Township, Pa., detailed geology 
of. 114-115 
Hays, Alexander, well of, log of. 143 
Hays, J. S., well of, log of. 134 
Homewood sandstone, character and distri¬ 
bution of. 82 
Hopewell Township, Pa., detailed geology 
of. 151-153 
Hundred-foot sand, character and distribu¬ 
tion of. 95,110,111,112 
fluids in. 16,17,45 
map of. Pocket (PI. IX) 
discussion of.-•. 45-47 
oil in. 9,44-45,114 
position of. 44,113,117,120,124,129,130,132-146 
map showing. Pocket (PI. IX) 
structure of, map showing.. Pocket (PI. IX) 
Hurry-up sand, gas in. 62 
occurrence of. 102 
position of. 140,146 
349(3—Bull. 318—07-13 
I. 
Page. 
Independence Township, Pa., detailed geol¬ 
ogy of. 124-127,149-150 
Investigation, methods of.22-25 
scope of. 11 
Island Creek pool, description of. 35 
Island Creek Township, Ohio, detailed ge¬ 
ology of.89-90 
J. 
Jefferson County, Ohio, detailed geology of. 87-94 
Jefferson Township, Pa., detailed geology 
of. 120-124 
Johnson, J. W., well of, log of. 100 
Jollytown coal, character and distribution 
of. 149,152-153,155-156,158- 
159,161.164.168-169,171-172,174-175 
section of. 169 
K. 
Keener sand, occurrence of. 34,112 
position of. 138 
Key horizons, descriptions of... 27-28,38-40,49-50 
definition of. 23 
maps showing. 
Pocket (Pis. Ill, VI, IX, X, XIII, 
Kidd farm, well on, log of. 110 
Kittanning coal. See Upper, Middle, and Lower 
Kittanning. 
Knox Township, Ohio, detailed geology of. 87-89 
Knoxville pool, description of. 34 
Krackemer farm, well on, log of. 139 
L. 
Lee farm, well on. 106 
Leech, Pressley, well of, log of. 136 
Lewis farm, well on. 104-105 
Limestone, origin of. 18-19 
Little Washington coal, character and dis¬ 
tribution of_ 72,155,159,161-162,172 
Longfitt farm, well on. 101-102 
Lower Dunkard coal, occurrence of. 112 
Lower Kittanning coal, character and distri¬ 
bution of. 81-82,89,95,96,124 
position of. 123 
use of, as key horizon. 27-28 
Lower Washington limestone, character and 
distribution of. 73-74, 
151,159,161-162,164,172 
Lunduff, John, well of. 101 
Lyle, J. R. and J., well of, log of. 139 
M. 
McCalmont, John, well of, log of. 145-146 
McClelland heirs, well of. 101 
McCorkle, J. S., well of, log of.. 134 
McCullough, W. H., well of, log of. 99 
McDonald, Ed., well of, log of. 147 
McDonald, K. N., wells of, logs of. 146-147 
McDonald pool, description of. 47 
McGuigan farm, well of, log of. 136-137 
