The Rocky Mountains begin in northern Mexico, where the axial crystalline rocks rise to 12,000 ft.
The expedition of Meriwether Lewis and William Clark in1804-1806did not touch the region, but a discharged member of the party, John Colter, in 1807 discovered the Yellowstone Park region and then crossed the Rocky Mountains to the head of Green river.
While this approached the average-3.5 for all the states west of the Rocky Mountains taken together, with the exception of Colorado, which had 5.2 - it was noticeably higher than that of its immediate neighbours, Idaho (1.9), Arizona (1.1) and Nevada (0.4).
As ores of zinc are usually shipped before smelting from widely separated places - Sweden, Spain, Algiers, Italy, Greece, Australia and the Rocky Mountains region of North America - it is important that they be separated from their mixtures at the mines.
The Rocky Mountain region as a whole, best named the Cordillera or Cordilleran belt, includes several parallel ranges of mountains of different structures and ages, the eastern one constituting the Rocky Mountains proper.
The Canadian river drains the eastern slope of the Rocky Mountains and flows in a general south-easterly direction through Texas into Oklahoma, where it empties into the Arkansas.
He was the elected Xerxes of vast herds of wild horses, whose pastures in those days were only fenced by the Rocky Mountains and the Alleghanies.
This knot of very lofty mountains, with Mount Fairweather and some others, all snowy and glacierclad for almost their whole height, are quite isolated from the highest points of the Rocky Mountains proper, which are 1000 m.
Through these Rocky Mountains the explorers and furtraders, by ascending the streams running down the eastern declivities of the mountains, and crossing by short portages to the streams of the western slope, have succeeded in discovering passes by which the mountain chain can be crossed, the range rarely exceeding 60 m.
East of the Rocky Mountains (Washington, 1891), and his Report on the Mound Explorations of the Bureau of Ethnology in the 12th Report (1894) of that Bureau, supplementing his earlier bulletins, Problem of the Ohio Mounds and the Circular, Square and Octagonal Earthworks of Ohio (1889); and W.