1st -12th Annual Report of the United States Geological and Geographical Survey of the Territories ...

abundant American bison appear basalt Bison bluffs buffalo cañon Carboniferous coal Colorado Creek crest Cretaceous Dakota sandstones deposited distance district Dolores Eagle River east eastern eastward eggs elevation extended farther feet flows Fork fossils Geological glaciers Grand River granite grasshoppers Gunnison Gunnison River hatched head height herds hills inch Indians insects junction Kansas Lake larvæ length locust lower mass Mesa metamorphic middle miles Missouri nearly northern northwest observed outcrop Park Range Pass Peak plains Plata plateau Platte River portion probably red beds region Report ridge rocks Rocky Mountains San Juan San Luis Valley sandstones Sangre de Cristo Sawatch Range seen shales side slope South Park South Platte River southern southward species spretus spring spurs station strata stream summit swarms thickness tion trachyte Triassic tributaries Uncompahgre Uncompahgre Plateau upper volcanic western westward wings