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Fic. 22.—Beautiful light cream-colored siliceous deposit in run-off from 
Artemisia Geyser, about one-eighth natural size. Photographed looking down 
into the hot water. The pebbly looking bottom is from 6 to 8 inches beneath 
surface, and is formed by the deposit in very much the same manner as the 
ripple deposits in Fig. 21. Photograph by Walcott. 
Fic. 23.—Yellowstone Canyon below Tower Falls Creek, showing two beauti- 
ful bands of columnar basalt interbedded in the early basic breccia formed of 
fragments of pyroxene-andesite, hornblende-andesite, and basalt associated 
with basic lava flow. Photograph by Walcott. 
