Preliminary report of the United States Geological Survey of Wyoming, and portions of contiguous territories : (being a second annual report of progress), under the authority of the Secretary of the Interior . Groups. The original sketch was taken on the spotby Mr. F. B. Meek in 1853, and is published by permission of ProfessorJames Hall, of Albany, New York. There are also beds of limestone, composed entirely of a small speciesof Cypris which gives to the rock a beautiful oolitic structure. Of fresh-water mussels, Unios^ Goniobases, Viviparas, FlanorbiHy several speciesare found at different
Preliminary report of the United States Geological Survey of Wyoming, and portions of contiguous territories : (being a second annual report of progress), under the authority of the Secretary of the Interior . Groups. The original sketch was taken on the spotby Mr. F. B. Meek in 1853, and is published by permission of ProfessorJames Hall, of Albany, New York. There are also beds of limestone, composed entirely of a small speciesof Cypris which gives to the rock a beautiful oolitic structure. Of fresh-water mussels, Unios^ Goniobases, Viviparas, FlanorbiHy several speciesare found at different localities. Sometimes the Goniohases and Unios arefound on a slab of limestone in great numbers, filled Avith the evidence that we can secure, points to the conclusion that all thesediments of the Bridger Group Avere deposited in the bottom of a i)iirelyfresh-water lake, with no access to salt or even brackish Avater from any 10 G 146 GEOLOGICAL SURVEY OF THE TERRITORIES. point. In regard to the extent of this great and most interesting lakebasin very little is known. All the explorations have been, hitherto, ofa hurried and superficial character. We believe that the Uinta Moun- Fig. tains form the southern shore, and that it extends down to the valleyof Green Eiver, at least to the entrance of White Eiver, and probablyfurther. Professor Dentons graphic description satisfies us that theformations are identical with those around Church Buttes: Looking from the summit of a high ridge on the east, a tract of country containingfive or six hundred square miles is distinctly visible. Over the whole surface is rock,bare rock cut into ravines, canons, gorges, and valleys, in magnificent relief—terraceupon terrace, pyramid beyond pyramid, rising to mountain heights; amphitheatersthat would hold a million spectators; walls, pillars, towers, castles everywhere. Itlooks like some ruined city of the gods, blasted, bare, desolate, but grand, beyond amortals telling. Orig
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Keywords: ., bookcentury1800, bookdecade1870, bookpublishe, booksubjectgeology
