no The American Geologist. February, 1903. 
taken out of San Felipe which was to irrigate all the country 
within the valley east of the river to below Albuquerque ; but, 
after work had been commenced, the ditch; company became 
disorganized and the work ceased. 
Larger and better crops could be raised if the water supply 
was properly handled. 
Mining. — In the region described in this paper, there are 
no mines worthy of mentioning here ; but just to the east of 
the Cochiti range are the Cochiti gold mines. Among the mines 
now in operation are the Washington, the Lone Star, the Al- 
bemarle and the Crown Point. The mill of the Albemarle 
mine alone puts out two bars of gold bullion every six days, 
valued at $3,600 each. 
Mineral Resources. — Coal. — The Fort Union coal form- 
ation, as we have seen, underlies nearly all the lands in this re- 
gion, except the mountain districts. Its coal outcrops are 
quite a distance from the railroad and until just recently only 
Mexicans and Indians knew of their occurrence. The coal 
is of good quality and the seams are thick. The time is not far 
distant when coal will be mined here on a large scale, the same 
as at Gallup at the western limit of the same coal horizon. 
Gypsum. — As we have already noticed, the Jurassic rocks 
wherever found are capped with gypsum from 10 to 40 feet 
in thickness. Over 60 square miles of it are exposed in this 
region. Owing to its thickness and its lack of cover it can be 
worked to great advantage. With the growth of the railroad 
facilities a great industry will be developed, for the deposits 
are unusually pure and easily worked. 
Gold, Silver, and Copper. — The mountains are crossed in 
all directions by mineral bearing veins; but, to date, the ores 
found are too low in grade to ship, the railroad being so far 
away; and the ore bodies are not sufficiently thick to warrant 
the erection of smelters on the ground. Should a railroad be 
extended up Jemez valley, however, mining there would at 
once become a paying business. 
Placer. — Placer mining is carried on in the Placita marl 
district ; but 'on account of the lack of water, only the dry- 
washer process for separating the gold is used. Men make 
good wages by this method ; but if water for hydraulic mining 
