46 
INDEX 
Page. 
Caves, in gypsum... 16,18 
Ceriopora . 26 
Cerusite .-. 37 
Coal . 27,31 
Colorado Desert ____ 14,19, 29 
Conglomerate, silicious.. 30 
Conularia .-. 26 
Cretaceous .......-.17,19,25,27 
at Dona Ana_ 17,19 
fossils. 17,27,39—40 
of Alabama_ 25 
between Fort Belknap and Preston... 27 
Crow Spring _:_ 20,21 
Cross Timbers _ 27 
Cyathophyllce _ 32 
D. 
Darwin, Charles _ 18,26 
Dawson, J. W .-. 18,26 
Delaware creek __- 21 
Des Moines, gypsum of_-_____ 18 
Doha Ana _ 17 
silver mine near...- 37 
Drifting sand _ 20 
Drift _ 16,21 
E. 
Master, Dr. J. D ...-. 37,38 
Efflorescence of salt . 20 
Emory, Major W. H. ...-.-. 12,17,40 
Encrinites _ 32 
Exogyra Texana _ 17, 27,39 
F. 
Fenestdla _ 26 
Ferruginous sandstone .. 29 
Fort Washita, Cretaceous at. 25 
Fort Belknap - 24,25 
section of strata at.__ 27 
Gr. 
Galena ---- 36—37 
Garrard, Lieutenant --- 7, 22 
Geological section, note on- 42 
Geological map, note upon. 42 
Granite .-...8,12,13,14,30 
for building purposes- 29,30 
Gray, A. B - 14 
Great Basin - 9 
Gryphxm-. - 17,27,39,40 
Guadalupe mountains, extent and direction of...... 7 
elevation of_ 8 
geology of.. 14 
water at the base_ 22 
Guadalupe Pass, elevation of........ 8 
Gypsum formation _ 16,17,18,19,25,34 
of South America___ 18, 26 
of Nova Scotia. 18, 26 
