Preliminary Report of the United States Geological Survey of Montana and Portions of Adjacent Territories: Being a ... Annual Report of Progress ..., Bind 11,Del 1877U.S. Government Printing Office, 1879 |
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angle anticlinal appear arenaceous basalt basin Bear River Blackfoot bluffs border Butte Cache Valley cañon Carboniferous Colorado crest Cretaceous débris deposits distance district drab east eastern eastward elevation erosion exposed exposures feet flank fold formations forms fossils Fox Hills Group geological granite gray Green River Green River Basin Gros Ventre heavy ledge horizon Inoceramus Jurassic Lake Laramie Group latter layers limestones locality lower Meek & Hayden miles mouth northeast northern northward Ostrea outcrop Peak plateau Pliocene portion Portneuf probably quartzites red beds region ridge River Range rocks Salt River Salt River Range sandstone sedimentary seen shales shell Silurian slope Snake River southern southward southwest species Springs Station strata stream summit surface Sweetwater Tertiary Téton thickness tion trachyte Triassic U. S. Geol valley vertical volcanic Wahsatch west side western westward White Wind River Wind River Mountains Wind River Range Wyoming
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Side xxii - although made known to the world only through a three or four days' exploration by a party of three men, are of the greatest importance." A report was made and published, with fourteen illustrations, in the Bulletin of the United States Geological and Geographical Survey of the Territories, second series,
Side xxi - of the American flora, from the Mississippi to the Pacific coast: That the vegetation of the middle latitudes of the continent resolves itself into three principal meridional floras, incomparably more diverse than those presented by any similar meridians in the Old World, being, in fact, as far as the trees, shrubs, and many
Side 582 - At a former time, when these dried-up fountains were all in motion, they must have made a beautiful display on a grand scale ; and nearly all this basin appears to me to have been formed under their action, and should be called the place of fountains.
Side 98 - Except in the crevices of the rock, and here and there on a ledge or bench of the mountain, where a few hardy pines have clustered together, these are perfectly bare and destitute of vegetation.
Side xxii - the continent, and of the effects of the great body of •water that occupied the whole saline region during (as it would appear) a glacial period. Lastly, curious information was obtained respecting the ages of not only the big trees of California, but of equally aged pines and junipers, which are proofs
Side 267 - was removed by some one of the various movements connected with the evolution of the continent. The climate and other physical conditions which were essential to the existence of the Dinosaurians of the Laramie period having evidently been continued into the Tertiary epochs that are represented by the Wasatch, Green
Side xvii - Colorado, and also to the equivalency of the latter with the Bitter Creek series west of the Rocky Mountains. The investigations of this year have fully confirmed these views by the discovery not merely of one or two doubtful species common to the strata of each of these regions, but by an identical
Side xxii - flora, temperate, subalpine, and alpine. 3. The Rocky Mountain region (in its widest sense extending from the Mississippi beyond its forest region to the Sierra Nevada), subdivisible into (a) a prairie flora, (/?) a desert or saline flora, (y) a Rocky Mountain proper flora, temperate, subalpine, and alpine.
Side 293 - Shell small, very thin, rather compressed, subovate or subcircular ; beaks moderately prominent and nearly central ; surface ornamented by about thirty regular, simple, distinctly defined, radiating costœ, which about equal the intermediate furrows, and (owing to the thinness of the valves) are well defined internally, and thus impart a plicated or
Side 266 - equivalent with those of the Upper Cretaceous of that part of the world. That the Fox Hills Group is of Upper Cretaceous age no one disputes, the only question being as to its place in the series. A comparison of its fossil invertebrate types with those of the European Cretaceous