INDEX. 
99 
Page. 
Lewis ranch, section of bluff near 52 
Lignites, analyses of 66 
Loma Vista, fossils found near 50 
Lord, E. C. E. , report on igneous rocks from 
vicinity of San Carlos and Chispa.. 88-95 
work of 73 
Loughridge, R. H., work of 67 
Lucas, F. A., fossils examined by 81 
Maloney,J. J., acknowledgments to 73 
Marshall, G. N., acknowledgments to 73 
information furnished by 86 
Maverick County Coal Company, section in 
mine of 23 
thickness of coal seam mined by 57 
McDaniel ranch, sections near 48, I'.), 62 
McGee, W J, definition by 16 
work of 67, 70-71 
Mexican ranch, section of hill near 52 
Mosquez Canyon, analysis of paisanite from 93 
Mugge,0., cited on occurrence of acmite- 
trachyte 94 
Mula Creek, character of surface and vege- 
tation near 28 
Myrick apiary, section of bluff at 52 
Neocene rocks, extent of 55 
Nueces River, occurrence of coal near 62 
relation of Cretaceous to Eocene along. . 36 
sections of Eocene on 34, 47-50, 62 
thickness of Eagle Pass formation on . . 35 
New Mexico, coal field in Texas and 11-12 
Olmos Creek, section on 58 
Osann, A., cited on igneous rocks 88 
cited on paisanite 92, 94 
work of 74 
Ott, M. C, information furnished by 62 
Owen. J., analysis of specimens collected by. 65 
cited on Carrizo sands 37 
cited on coal near Uvalde 61 
cited on thickness of coal bed near 
Eagle Pass 57 
fossils collected by 27 
work of 68-69 
Paisanite from Mosquez Canyon, analysis of 93 
Palafox, figure showing section of bluffs 
and terraces at 55 
section of butte near 40 
Paloma siding, fossils found near 25-26 
Pantelleria, analysis of pantellerite from . . 93 
Pantellerite from Pantelleria, analysis of .. 93 
Penrose, R. A. F., analyses by 61, 66 
cited on fossils from Webb bluff 45 
cited on Santo Tomas coal 6^ 
cited on section at Webb bluff 39 
quoted on section along Rio Grande 39 
from Webb bluff to Laredo 45 
reference to 35 
work of 69 
Pilot ranch, record of prospect drill at 42-44 
Pleistocene terraces, occurrence of 55 
Presidio County, analyses of coal and coke 
from 88 
analysis of quartz-pantellerite from 92 
Quartz-pantellerite from Presidio County, 
analysis of 92 
description of 90-95 
geographic distribution of 83 
Rhyolite breccia, description of 89-90 
Page. 
Rhyolite, dacitic, occurrence of 95 
Rio Escondido, section on 24 
Rio Grande, conclusion regarding coal fields 
of the 66-67 
Eocene rocks near 37-46 
generalized diagram of terraces on 55 
plate showing bluff at Eagle Pass 54 
plate showing view of 26 
relation of Cretaceous to Eocene along. . 35 
section from Webb bluff to Laredo 
along 46 
section on 20 
thickness of Eagle Pass formation on . . 35 
Rio Grande coal fields, map showing gen- 
eral position of 14 
Rio Grande Coal and Irrigation Company, 
analysis of coal from mine of 64 
section at mine of 44 
Rio Grande Plains, topography of 13-15 
vegetation on 15 
Riper, J. E. van, acknowledgments to 73 
Rock—, analysis by 61 
Rockdale, analysis of lignite from 66 
Roessler, F. E., cited on section near Eagle 
Pass 25 
Roy, D. J., acknowledgments to 44 
Rusk County, analysis of lignite from 66 
Russell, R. E., analyses furnished by 88 
Sabinal, thickness of Anacacho formation 
near 33 
Sabinal River, exposures on 34 
Salado Creek, character of surface near 29 
fossils found on and near 29 
section at ford on north side of 28 
San Ambrosia Creek, exposures near 37 
section near 38 
San Carlos, altitude of 75 
character of coal from 87 
fossils from Vieja Mountains near.. 78-79,80 
location of 73 
map showing topographic features in 
vicinity of 74 
plates showing views from 80, 82 
report on igneous rocks from vicinity 
of Chispa and 88-95 
sections near 77-78, 79-80, 81, 84 
topography near 75 
San Carlos Coal Company, fossils from faull 
near shaft of 81 
sections in coal seam aud shaft of 79-80 
San Carlos coal field consideration of 73-88 
San Carlos formation, strata below 84-85 
fossils found below 84 
section of beds below 84 
San Carlos section, resume of 81 
San Felipe Creek, Fort Worth limestone on. 16 
San Felipe Springs, fossils found near 16-17 
San Lorenzo Creek reconnaissance from 
Carrizo Springs to 47 
San Miguel beds, fossils found in 22 
occurrence and character of 21 -22, 28 
San Pedro seam, section of 63 
Santa Rosa region. analysis of coal from ... 61 
Santo Tomas, dip at 45 
elevation at 13 
figure showing sandstone and clays 
above coal horizon at 54 
