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questions :Rocky mountain
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[Member (365WT)]answers [Chinese ]Time :2019-08-19
When the British colonists first arrived in the Boeing area of Assini, Canada, they learned that the local Indian tribe was called "stone", and the mountain in the area was bare and no vegetation, so the mountain was called "Stone Mountain". "rocky", later expanded to the entire mountain range north and south.

The Rocky Mountains account for most of the large plateau system in the main terrain of the western North American continent. Overall, the mountains included in the Rocky Mountains extend southward from northern Alberta and British Columbia, and extend from the western United States to the Mexican border for a total length of approximately 4,800 km (3,000 miles). In some places, the mountain is hundreds of feet wide.
Most of the boundaries are not easy to determine, especially in the remote northwestern region, where the Alaska Brooks Mountains are often classified as the Rocky Mountains. There are snow-capped peaks, dense coniferous forests, wide valleys, clear streams, open skies and rich mineral resources. Millions of people live and work here, and millions of people come here every year. Travel tour. The Rocky Mountains have the most popular tourist destinations in North America.
The Rocky Mountains are generally defined as the Rio River from Canada to the Grand River in New Mexico. The extension of the north and south ends can only be part of the American mountains and no longer belong to the Rocky Mountains. The younger part of the Rocky Mountains was raised during the Cretaceous era (approximately 140 million to 65 million years ago), and the south may be in the Precambrian (about 3.9 billion years). It was already raised 600 million years ago.

The geological structure of the Rocky Mountains is mainly composed of igneous and metamorphic rocks, and there are also young sedimentary rocks on the southern edge. In some areas there are volcanic eruptions in the Tertiary (about 65 million to 1.8 million years ago).
The erosion of rivers over thousands of years has made the valleys of the mountains a relatively flat basin. The Midwest of the Rocky Mountains is composed of faults and pleated granites of the Paleozoic and Mesozoic. From the Pleistocene to the Holocene (18 million years -11,000 years ago), there were many ice ages. At that time, 90% of the Yellowstone Parks were covered by glaciers. From 1550 to 1860, they belonged to the "Little Ice Age". The glaciers used to Push forward.
The Rocky Mountain was originally a huge geosyncline. It was only a shallow sea at the beginning of the Cretaceous. During the Tertiary, large-scale orogenic movements and volcanic eruptions occurred. The crust developed strong folds and compressions. The mountains re-emerged and formed a tall Granite mountain system; in the Quaternary, the role of glaciers left steep horns, ice buckets, troughs and other glacial erosion features, coupled with long-term crustal changes, gradually forming the status quo of the Rocky Mountains.
The mountains are mainly formed in the Laramian orogeny from the end of the Cretaceous to the early Tertiary, at the end of the Cretaceous (about 145.5 million years ago - about 65.5 million years ago) to the Old Tertiary (65.50 million years ago ~ 2300 years ago). Ten thousand years ago). From the early Cambrian period (before 542 million years ago) to the Cretaceous, the strata were subjected to pressure in the east-west direction, forming folds (the formation was wavy) and faults (the formation was disconnected) and then bulging. After the uplift and vigorous erosion, the structural terrain is more complicated. The North Rocky Mountains to the north of the Yellowstone National Park, the Precambrian and Paleozoic granites are exposed in the west, with tall blocky mountains as the main; the eastern strips are more common on the basis of the long columns of folds and thrust faults. Take the fault valley.
The Yellowstone Park to the Wyoming Basin is a medium-lying mountain with a wide width. The western part is characterized by a strip-shaped mountain range and a faulty valley. The eastern part is mostly a single anticline uplift with steeply edged plateau mountains. The mountain is short and varies in direction. Widely inclined basin. South of the Wyoming Basin is the South Rocky Mountains. It is the most majestic part of the entire Rocky Mountains. It consists of two groups of parallel anticline mountains, revealing Precambrian crystalline rocks, with a high altitude. There are 48 peaks above 4,200 meters, and Mount Elbert is here. There is a stratum called "Burges shale" in this area. In the middle of the Cambrian period (513 million years ago ~ 5.The strata of the "Golden Shrimp" and "Weird Pest" were discovered one after another in the strata of 1 billion years ago. Compared with the current creatures, their shape is incredible. In 1980, the Bourges shale was discovered. Huo National Park was first selected as the World Natural Heritage. Later, in 1984, the area selected as a natural heritage expanded to become the Canadian Rocky Park group...

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