HOT SPRINGS AT THERMOPOLIS, WYOMING 



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deposit from one to the other. It is evident, however, from the 

 relations that there has been extensive erosion since the earhest 

 period marked by the higher terraces on which the travertine caps 

 are now found. The high butte near the cemetery — the one shown 

 to the left in Figs. 3 and 4 — is probably the remnant of a much 



Fig. 2. — Travertine terrace of the Great Hot Spring on the east bank of Bighorn 

 River near Thermopolis, Wyo. The spring is under the S. In the foreground are 

 extinct hot-spring craters -and a low ridge with long fissure in its summit. Shows 

 upturned red beds and overlying formations. 



more extended sheet of the travertine which was largely removed 

 prior to or during the development of the lower terraces. 



It is evident, from the disposition of the material, that the springs 

 have shifted their position, but in general the outflow has been in 

 the immediate vicinity of the crest of the anticline. The hot-spring 

 deposits show remnants of numerous hot-spring craters and cracks, 

 some of the most marked of which are on the terraces near the river. 

 On the west bank, a short distance north of the bathhouse, there 

 is an empty crater 30 feet in diameter, shown in Fig. 2, indicating 

 the former existence of a large hot pool, and there is another similar 



