ROCKY MOUNTAINS from CANADA to WYOMING the Rocky Mountain Range of North America Forms the Cordilleran Backbone of the Great
ROCKY MOUNTAINS FROM CANADA TO WYOMING Swiftcurrent Lake and East Glacier sunrise The Rocky Mountain range of North America forms the cordilleran backbone of the great uplands that dominates the west, and extends from northern Alberta and British Columbia southward to New Mexico, a distance of some 3,000 miles (4,800 km). Differing in subranges, the rockies still share the physical attributes of high elevations with many peaks exceeding 13,000 feet [4,000 metres] elevation and great local relief (typically 5,000 to 7,000 feet in vertical difference between the base and summit of ranges. In contrast to the coastal ranges, the sedimentary formations form spectacular scenery from past glaciation and volcanic activity. Central to the Canadian Rockies, the Columbia Icefield is situated on the continental divide at elevations between 10,000 to 13,000 feet (3,000 to 4,000 metres). It includes the large Athabasca Glacier, which is nearly five miles long and about a mile wide. The Canadian Rockies originate a several large rivers including the Columbia, Fraser, the Missouri and Mackenzie, and equally divided flowing east (Atlantic and Arctic oceans) and west (Pacific Ocean). There is a vast forested and tundra ecosystem within the Canadian and Montana/Wyoming Rocky Mountain Range. There are ten forested zones , and in more southern, warmer, or drier areas are defined by the presence of pinyon pine/juniper, ponderosa pine, or oak mixed with pine. In more northern, colder, or wetter areas, zones are defined by Douglas firs, western hemlock, lodgepole pines/quaking aspens, or fir mixed with spruce.
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