172 
INDEX. 
Page. 
Gas, natural, at Anse la Butte, La 131 
at Big Hill, Matagorda County, Tex. 41, 42, 127 
at Bryan Heights, Tex 127 
in Coastal Plain generally 154 
at Damon Mound, Tex 40, 42 
at Davis Hill, Tex 127 
at Dayton Hill, Tex 126 
at Fairchild Hill, Tex 48 
at Hackb rry Island, La 133 
at High Island, Tex 122, 123 
at Riser Hill, Tex 125 
in Sabine Parish, La 55 
near Sabine Pass, Tex 113 
in Sour Lake district 113, 116 
at Tilden, Tex 18 
at Velasco, Tex 41, 42 
Geologic history of Coastal Plain 66-67. 145 
Gravels at base of Columbia beds 62-65 
impediment to well drilling 65 
Gravity, specific, of various petroleums. . . 146-147 
Grimes County, Tex., geology of 43 
Guadalupe River, geologic sections on 30-32 
Gulf Coastal Plain, defined 10, 13 
eastern division, geology of 19-30 
origin of 11-12 
subdivisions of 15 
topography of 10-15 
western division, geology of 16-19 
prospecting for petroleum in 19 
Hackberry Island, La., wells at 131-133 
Hardin County, Tex., well records in 59,60 
Harris County, Tex., geology of 45 
Hidalgo County, Tex., dune- in 16 
geology of 17 
High Island, geology of 122-125 
sketch contour map of 123 
well rec< >rd at 124 
History, geologic, of Coastal Plain 66-67, 145 
Hornbeck, La. , geologic section at 53 
Houston, Tex., geology of region 32 
Houston County, Tex., geology of 49 
Huntsville, Tex., well record at 45 
Illuminating oil, suitability of Gulf coast 
petroleum for 157 
Irish Creek , geologic section on 31 
Iron, precipitate of, mistaken for petro- 
leum 45 
Islands, coast, occurrence of 42 
origin of 11 
Jasper County, Tex., geology of 49, 51 
Jefferson County, Tex., geologic section in. 61 
Jennings district, La., geology of 127 
map of 128 
wells in, list of 130 
Keys, along coast 42 
origin of 11 
Kiser Hill district, described 125 
well record in 40 
Lafayette sands, described 26 
deposition and erosion of 66 
occurrence of 11, 20, 44, 56, 65, 125 
Lagoons, along coast 42 
Lake Charles, La. , geology of 28 
well record at 136 
Liberty County Tex., geology of 45 
Lignite, occurrence of 20, 51, 87 
Page. 
Little Sandy Creek, geologic section on 51 
Live Oak County, Tex., geology of 17 
Logs of wells. See Wells, records of. 
McMullen County, Tex., geology of 17 
Magnolia, occurrence of 15 
Maltha, early reference to occurrence of. . . 12 
Marshes, coast 29, 42 
interior 28 
salt 60 
Matagorda Bay, geology of region 34, 35 
Medanos, on Gulf Coastal Plain 16 
Mesquite. distribution of 15 
Miocene rocks, in eastern division of Coastal 
Plain 20,23,24,26 
in western division of Coastal Plain 17 
between Brazos and Trinity rivers 44 
in region surrounding Spindletop Pool. 87 
Montgomery County, Tex., geology of 43, 44 
Mount Selman beds, occurrence of 20 
Neches River, geology of region 28, 48-61 
Neocene rocks in eastern division of Gulf 
Coastal Plain 20,24 
New Iberia Parish, La, geology of 62 
New ton County, Tex., geologic section in . 57 
geology of 49, 51 
Nueces River Valley, geology of 17 
Oak, occurrence of 15, 16 
O'Connorsport, Tex., well record at 34, 35 
Oil. See Petroleum. 
Oil ponds, Sabine Pass 104-112 
Oligocene rocks in eastern division of 
Coastal Plain 23 
Orange County, Tex., geology of 28, 32 
Perry ville, geology of region 31 
Petroleum at Anse la. Butte, La 63, 131 
at Damon Mound, Tex 37, 38, 40 
at Hackberry Island, La 133 
at High Island, Tex 124, 125 
in Jennings district, La., quality of 129 
!i-t of wells producing 130 
at Kiser Hill, Tex 125 
in minor Louisiana districts 135-137 
in minor Texas districts 125-127 
in Sabine Parish , La 55, 113 
at Saratoga, Tex 59, 60 
at Sour Lake, Tex 116-118 
at Sulphur, La 133, 135 
at Vinton, La 135 
conditions of accumulation of, dis- 
cussed 140-145 
diatoms as possible source of 108-111, 138 
distillation of, discussed 150-153 
early references to 12, 113 
effects of inhaling vapor of 170 
geologic source of 23, 25 
iron precipita te mistaken for 45 
oil ponds of Sabine Pass. 104-112 
origin of, discussed 108-111. 137-140 
pressure in wells, discussed 154-157 
producing districts, list of 68 
producing rock, nature of, in Jennings 
district, La 129 
in Spindletop pool 70-71 
relation to salt water 119 
Texas-Louisiana, chemical properties 
of 148-154 
