Geology, Vol. 1 [of 3]

by Thomas C. Chamberlin; Rollin D. Salisbury

U. S. Geol. Surv.

Scale, 2+ miles per inch.

Fig. 2. CALIFORNIA.

Fig. 210.—A “talus glacier,” in Silver Basin, near Silverton, Colo. (Cross, U. S. Geol. Surv.)

Fig. 211.—A huge mass of rock settling into the Canyon of the Colorado. A result of gravity action. (Atwood.)

SPRINGS AND FLOWING WELLS.

The term spring is applied to any water which issues from beneath the surface with sufficient volume to cause a distinct current. If the water issues so slowly as to merely keep the surface moist, it is not called a spring, but seepage. The spring from which water issues with a strong current, especially if it be upward, is comparable to a flowing well, while the spring from which water issues with little force, and without upward movement, is comparable to the flow of water into a common well.