. Annual report. 1st-12th, 1867-1878. Geology. GEOLOGICAL SURVEY OF THE TEREITOEIES. 113 waters of this little fountain lias worn a deep channel or furrow into the vertical sides of the mountain. The Twin Buttes are two conical mountains, partially separated from the main range, and on the sum- mit, a few vents are sending forth their columns of steam. As far as the eye can reach, can be seen the peculiar plateau mountain ranges, black' with the dense forests of pine, averaging from 9,000 to 10,000 feet above sea-level. On the west side of the Fire-Hole, near its mar- gin, are four small lakes
. Annual report. 1st-12th, 1867-1878. Geology. GEOLOGICAL SURVEY OF THE TEREITOEIES. 113 waters of this little fountain lias worn a deep channel or furrow into the vertical sides of the mountain. The Twin Buttes are two conical mountains, partially separated from the main range, and on the sum- mit, a few vents are sending forth their columns of steam. As far as the eye can reach, can be seen the peculiar plateau mountain ranges, black' with the dense forests of pine, averaging from 9,000 to 10,000 feet above sea-level. On the west side of the Fire-Hole, near its mar- gin, are four small lakes with quiet surfaces, with water as blue as the sky. One of them is about half a mile in length. The waters are cold at the present time, but the basins present the appearance of having been enormous hot springs at some period in the past. From our camp on the main branch that enters the Fire-Hole at the upper end of the lower group of springs on the borders of the rim, we made our examinations down the stream, descending the east side and return- Fig. ing on the opposite side, and then passing up the west branch, noting all the springs of importance, taking the temperatures, and securing brief descrip- tions of their peculi- arities. Most of them do not differ materi- ally from those already described, so that I shall notice only the most important. The numbers of the vents can be understood by reference to the chart, although many of the less important and dead springs are omit- ted. The first one we shall notice is located on the right branch of the river, and from the triangular shape of its basin,. 8 by 10 feet, we named it the ''Conch ; All along the margins of the river hundreds of springs, which we could not note, but which aid in swelling the volume of the stream, issue from beneath the siliceous crust. A little below the Conch Spring, on the very margin of the river, there is a fine geyser, which has built for itself a crater three feet high, with a shell
Size: 1671px × 1496px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1860, bookpublishe, booksubjectgeology
