Identifier: colliersnewencyc03newy (find matches)
Title: Collier's new encyclopedia : a loose-leaf and self-revising reference work ... with 515 illustrations and ninety-six maps
Year: 1921 (1920s)
Authors:
Subjects: Encyclopedias and dictionaries
Publisher: New York : P. F. Collier
Contributing Library: University of California Libraries
Digitizing Sponsor: Internet Archive

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ferous,Jurassic, and triassic strata in the W.central parts. The extreme E, plain islargely tertiary, and the S. W. is chieflycretaceous, the valleys of the SouthPlatte and Arkansas rivers being of thisformation. Soil, Climate, etc.—Colorado has about15,000 square miles of fertile arableland, and about 70,000 square miles ofgrazing land. Most of the land will pro-duce abundant crops under irrigation,which is now being carried on exten-sively, one irrigating canal having alength of 54 miles. The mountains arewell covered with pine, spruce, and firforests. The climate is very healthfuland mild, and people suffering from pul-monary and asthmatic troubles find muchrelief here. There are various mineralsprings, which are valuable for medicinalpurposes. The hot sulphur springs inMiddle Park and Wagon Wneel gap, andthe hot, iron, and soda springs in Mani-tou are popular resorts. Mineral Production.—Colorado formany years was first among the Statesin the value of its mineral products. For
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COLORADO 71 COLORADO BEETLE various reasons, including the develop-ment of mineral fields in other WesternStates, the working out of hitherto im-portant mines, and the decline in theprice of silver, have resulted in a rela-tive change of this position. The min-eral industry, however, is still the mostimportant in the State, and Coloradocontinues to rank high among the min-eral-producing States. The total valueof the mineral products in 1917, thelatest date for which complete figuresare available, was $80,586,021. Coal wasthe most valuable of the mineral prod-ucts, with 12,483,336 tons, valued at $27,-669,129. Gold was second in value with760,901 fine ounces, valued at $15,729,-224. Zinc was third with 60,158 tons,valued at $12,272,209. The silver pro-duction was 7,304,353 fine ounces, valuedat $6,018,787. Other important mineralproducts were coke, clay products,tungsten ore, and ferro alloys. The pro-duction of the principal minerals minedin the State in 1919 was as follows: Gold,$9,8

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