Eleventh annual report of the United States Geological and Geographical Survey of the Territories : embracing Idaho and Wyoming : being a report of progress of the exploration for the year 1877 . TZS. G-eoZogicaZ Svwvey. JPlccte LXXIU. SODA SPRINGS. pkale.] DESCRIPTIVE GEOLOGY—SODA SPRINGS, &C. 591 are two small vents, from which hot air and gas escape. The tem-peratures here were 83° F. and 85° F. There is a great deal of olddeposit surrounding these springs, and the remnants of spring basins,in which the springs have long been extinct, are seen in many the opposite side of the Bear
Eleventh annual report of the United States Geological and Geographical Survey of the Territories : embracing Idaho and Wyoming : being a report of progress of the exploration for the year 1877 . TZS. G-eoZogicaZ Svwvey. JPlccte LXXIU. SODA SPRINGS. pkale.] DESCRIPTIVE GEOLOGY—SODA SPRINGS, &C. 591 are two small vents, from which hot air and gas escape. The tem-peratures here were 83° F. and 85° F. There is a great deal of olddeposit surrounding these springs, and the remnants of spring basins,in which the springs have long been extinct, are seen in many the opposite side of the Bear several reddish and yellowish cones orchimneys are still standing. A small bluff just above the Steamboat Spring has a curious bright-yel-low tufa, with a coral-like structure, which has been deposited by springsin times long past. It is calcareous,1 colored with iron. The whole bankof the river for some distance is macle up of tufa. Even some distanceback from the river there is but little soil, the hard tufa forming mostof the surface, covered in many places with a saline efflorescence. Above the mound of yellow tufa, a creek comes in, which we will callBasin Creek, as the large spring at the head of it was called Basin Springby F
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