If ISf H 4IS0AI JOSFOE3P OF TH J UBISISD STAT1SS 
amoaiGAL iad gj» graphical suby-sy of see tsrbiiosies.isys* 
By. 2*. V, HAYDJSII 
"The geological examination Tby Ur. Holmes was fruitful of 
most important results. His investigations Vifere extended from 
Colorado into portions of Utah, Arlsorn, and Hew Mexico® 
In 1874, Ur. fndlich examined the district lying to the east, 
so that 1-Ir. holmes took up the work whore he left off at 108° west 
longitude, and carried it without difficulty to 109° 30*. In 
general, the geology is not greatly complicated. The section of 
stratified rocks- exposed extends from the Tertiary to the Carboni¬ 
ferous, including about 2,000 foot of the former and slight ex¬ 
posures merely of the latter. About 9,000 feet of measures pass¬ 
ed under examination. Of other rocks, there are—four small 
areas of trachyte, ere limited - area of metamerphi© rock, And a 
few unimportant dikes. n (page G) 
"Of the 6,000 square nil as, 6,700 arc of sedimentary rocks; 
230 of these in the southeast are of the so-called XSgaitie; 800, 
chiefly included in the Hass' Verde, belong to the Upper Cretaceous; 
and the remaining 4,900 to the lower Cretaceous, and such of the 
earlier periods as are exposed in the crooked and narrow valleys, 
and about the trachytic groups. In the Cretaceous series, Mr* 
Holmes examined a number of seams of workable coal, procured fossils 
in ten distinct horizons, and expects to he able to identify these 
horizons with such corresponding ones as exist on the Atlantic alone. 
The section obtained is the most complete arid satisfactory made in 
Colorado up to this tine. The trachyte areas include about 250 
square miles, and seem to present many remarkable and interesting 
features. 
The prehistoric remains in the canons and lowlands of the 
Southwest are of great interest, and the study o t thorn by Hr. Holmes 
was as complete as possible under the circumstances* Many cliff- 
houses, built in extraordinary situations, and still in a fin© 
state of preservation, were examined. A good collection of pottery, 
stone Implements, the latter including arrow-heads, axes, and ear 
ornaments, etc., some places of rope, fragments of matting, water- 
jars, corn, and beans, and other articles were exhumed from the 
debris of a house. Many graves were found, and a number of skulls 
and she2©tors that may fairly be attributed to the prehistoric in¬ 
habitants were added to the collection.** (page 7-8) 
