Bulletin of the United States Geological Survey Volume 9
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1889 edition. Excerpt: ...and sedimentary materials in the crater walls. "The smaller lake," according to Hague, u in most of it- features, bears a close resemblance to the one just described and from wbich it is separated by a narrow ridge only an eighth of a mile wide. It has the same crater-like basin, but the banks are not more than 60 or 70 feet in height and the lake, even in spring, is scarcely more than one-fifth of a mile in diameter. There is no supply of fresh water from the surface, and at tbe time of our visit, in August, the water was much more dense than in the larger lake. Over a great part of the surface was found a thick incrustatiou of trona strong enough to bear up a man, under which is a greenish slime and occasional pools of water. One characteristic feature of the shore is the green and purplish tints of the moist sands, which, upon being dried, present the usual earthy colors." The trona from the small soda lake, upon being subjected to analysis yielded the following:2 Sulphate of soda 0.99 Chloride of sodium 1.10 Carbonate of soda CO. 27 Water and free carboni c acid 28. 83 Insoluble residue 2.81 100.00 'Vol. 1, p. 510--513; vol. 2, p. 740--750. 2Hague: King's Rep. 40th Parallel, vol. 2, 1877, p. 749. Russell (op. cit., p. 73., note) says: "The smaller lake (in 1882) had been so changed by excavation and tho construction of evaporating vats that its original form had been destroyed. Its surface is 20 feet higher than the larger lake and 65 feet below the general desert, surface. Tho highest point ou the crater rim is 80 feet above tho bottom of tho depression," Hague also says of these lakes (op. cit., p. 740): "they lie below the level of the plain, in which are probably ancient craters, and are not observed...
- Paperback | 268 pages
- 189 x 246 x 14mm | 485g
- 27 Jun 2012
- Miami Fl, United States
- Illustrations, black and white