Record op Geology of Texas, 188V-1896. 
237 
chronology and sequence even of local events can be ascertained and under- 
stood only by comparing all or most of the features of these localities 
with each other/' P. 383. 
In his description of the Hazel mine, situated “about ten miles north 
of Allamore station, on the Texas and Pacific [Railroad, ” the writer says: 
“The gangue is nearly perpendicular. Its width to a depth of about 500 
feet averages 34 feet, below this depth it widens to over forty feet. Its 
longitudinal extension may be traced for several miles, and its nearly 
uniform thickness is ascertained for 1800 feet by the present workings 
* * The gangue is in a fissure between a fine-grained red sandstone 
of probable Devonian age, which also forms the walls, and which, in the 
vicinity of the gangue, is more or less metalliferous. The gangue has a 
whitish grey colored calcareous silicate, more or less impregnated through 
nearly its whole width with copper and silver sulphide and other metal 
combinations, and numerous richer veinlets fill the space between the 
two principal veins known as the north and south veins." Pp. 387-388. 
376. 
The Nonmetallic Mineral Resources of the State of Texas. 
Transactions of the Texas Academy of Science, Vol. I. ISTo. 3, 
pp. 97-103. Read December 31, 1893. 
“The mineral resources of Texas are not confined to the deposits of ores 
of base and precious metals, but there is in the State an abundance of 
other minerals, not regarded ores, but nevertheless of great value. Some 
of these are partly appreciated and utilized, but only to a very limited 
degree. The existence of others, and that they might be of practical 
value, is known, but up to the present time they are not utilized; of others 
still, the existence is known, but their value is not even suspected by the 
greater part of the people." 
The subjects discussed are the Texas Brown Coal; experiments in cok- 
ing; Brown Coal as fuel; fire clays; kaolin; cement rocks; salt deposits; 
gypsum deposits; heavy spar; granites and marbles; semi-precious stones. 
377. ^ ^ 
Trans-Pecos Texas. 
Fourth Ann. Rept. of the Geol. Surv. of Texas, 1893, Pt. I, 
pp. 139-175. 1 plate of sections. Austin, 1893. 
Contents: Introduction. Rocks determined by Dr. Osann. Mineral 
iResourees. Assays of some Trans-Pecos Ores. Artesian Wells, Reservoirs, 
and Agriculture. Plants. Stratified Rocks.' Sections. 
“The study of the geological features of Trans-Pecos Texas, from the 
strictly scientific point of view, needs, more than the study of other moun- 
tainous regions, the assistance of the microscope and of the chemical labo- 
ratory, because in most cases the connections and continuity of the moun- 
tain ranges and groups are covered and hidden by extensive fiats and 
basins filled 1500 and more feet with the debris of older and newer for- 
mations." P. 141. 
Noticed in Amer. Nat., Vol. XXVIII, March, 1894, p. 263. 
