Geological Landform
Nevada, Sierra) is also Sierranevada. It is an integral part of the Western edge of the North America Coilara Mountain. East of California, California. South and south extends 640 kilometers. The highest peak Whitney Mountain is 4418 meters above sea level, which is the highest peak of the United States. The Dongpo is steep, dry and non-forest; the western forest is dense. Rich water resources and gold mines. The peak has a modern glacier. The natural landscape is unique, and there are national parks.
The Nevada Mountain is a major mountain range in the west of North America, which is lie in the eastern edge of California, USA. The mountains are huge, the western Central Valley Ground island, and the east neighboring basins and mountain ranges.
From the Mojari Desert to the north of California and the Kasaka mountains in Oregon, there are more than 400 kilometers (250 miles), the LakeTahoe area is about 129 km (80 ), The southern part is about 80 km (50 miles). There is a magnificent ridgeline and spectacular landform, one of the most magnificent natural scenic spots in the United States.
Nevada Mountains Beauty (20)
For the Amusement Center, its four seasons attracts residents in large cities in California. It is still a quite important power supply and water source. The famous California "Golden Hot" is concentrated in this area.Due to mining, logging and tourism, changes in mountainous roots in many areas have changed more than a few thousand years of glaciers and flow.
On both sides of the Nevada Mountains, the ridges and peaks are obvious. The mountain peaks are 3350 ~ 4270 meters (11,000 ~ 14,000 feet), including the Whitney Peak 4418 meters (14494), the highest peak of the United States. The peak of the north is much lower, and the mountain peaks in the north of Tawhuo are only 7,000 to 9,000 feet.
Most of the rocks are granite or approximate granite. Sedimentary rock mezzanies (all-in-place places) and some large-scale ejected rays, especially in the north of Thaua, especially in the northern part of Thajo, The rocks are combined with volcanic rocks in the Kars.
Climate characteristics
Nevada Mountain (3 photos)
is in midwei zone, and there is also an influence of the Pacific Ocean and the slowness. Mountain climate. Although the winter temperature is reduced to -18 ° C (0 ° F), there is little low temperature in the hillside. The northwest of the mountain range is in the middle of the winter storm route in the middle of the North America. As a result, in the wet season (November to April) to the wind, the Western Poetry is abundant, and the wind surface (eastern side) has a significant rain and shadow effect.The average precipitation of the western foothills 760 mm (30 吋), the northern half of the mountain is 70 ~ 80 吋. There are more precipitation in the backdrop, only 20 ~ 40 吋. Snowfall increases with altitude and latitude, the northern mountain is 10 ~ 12 meters (33 ~ 38). Echosummit has a lot of snow 1.7 meters (55), 2,160 meters (7085) at sea level (Donnerpass) has been measured by 20 meters (67). The snow is 3 ~ 4.6 meters above sea level (10 ~ 15) is not rare.
The wind blanks over the mountains of the Nevada are mainly in the Pacific high-pressure anti-gas, the summer is most powerful, and the dry air passes through the mountains to the ocean. If this high pressure is not weakened in winter, there will be a continuous period of drought. In the mid-1930s, in the mid-190s, in the early 1990s, this happened, at this time, in the middle of the spray airflow in the middle latitude It will weaken, divided or pushed to the north.
Water system
Nevada Mountain (3 photos)
Sparse Western Spo is a series of rivers and rivers, riverside How much grows. Yuba River, Ameli River, Mokelumne, Stanislaus River, Merced) River, Kern (Kern) river, etc. has dominated Status granite and some volcanic rocks cut into deep valley. In addition to the Christ, the rivers are exchanged into the Sajia River and the south of the Sajia River in the central valley of the north, and the two tributes are in the San Francisco Bay as a trip to the Delta, and finally inject the Pacific. The Enland River is injected into the Beli, the south of Sanhua Jinhe, Navista Lake Basin.Begin 300,000 years ago during the update of the Glacier, the valley etched by the river has been covered by large glacs. The glacier climate has at least 4 development and disappearances, each time has excessive snow builds ice and snow wilderness and deep glaciers.
Glacier Elegly etch the Vigrant Valley of the West Valley into a U-Valley, the bottom of the valley is about 5,000 in the sea level. The mountain is extremely ice, and the iceberg is combined with a ice hat. This ice hat is from the mountains of Towerhu, Huban to the Alpine near Whitney, stretches nearly 322 km (200).
The ice hat reached out, and a few fingers, the gentle wedn slopes are longer, and the earth is shorter. The erosion caused by the glaciers is very spectacular: there is a huge ice bucket (circular aquarium, the rock wall is steep), there is ice (rock formation), and thousands of glacier lakes are in high mountains and semi-mountain landscapes. superior. This exciting magnificent terrain is the main landscape of Yosemite National Park and Tawhuo Basin. Tawhuo is the world's largest, deepest alpine lake, nearly 518 square kilometers (200 square miles), and the deepest part of the northwest is about 500 meters (1640).
Natural Resources
The western mountain in Nevada has 5 distinctive vegetation areas. Most of the lower footfelts are deciduous trees and shrubs, as well as evergreen inland activity (quercuswislizenii). There is a high footfelio with black oak, cushion and North American cedar. The mountain forest is the main commercial timber area, where there is a jeffreypine and a huge (Sequoia National Park is a public protected area designed for this).
There is black pine, mountains, and mountains and western white pine in the forest in the forest. Forest lines are covered with moss, lichens and low alpine flowering plants. Drought Dongpo Mountains include bush, Rosacea light gray bush, 桧, dwarf and poplar. In addition to the mountains, the mountains have a thick evergreen broadlet plexus, which mainly have a dwarf, bear fruit and California evergreen shrub.
The most vulnerable mountainous mammals in the Nevada Mountains since the 20th century are not so rich, and some are more and more people. The area of black bear is larger than the gray bear from the group.
Shi Goat is now only in the south. The deer and the cougar life live in the foot of the mountain. In the middle, low altitude of the height of the mountains, smaller mammals include American, Canadian, red cat, hutet, and northern fry. Fishing and wolf have rarely see. The upper limit of trees vegetation habitats rabbits, bunny rabbit and drought.
The rich bird in Nevada has a blue head Blackbird, California, Bailing and tires, California, Pearl, canyon and ridiculous, tits, and tits, gorge and ridiculous , Spots and spotted pigeons; and Hammondflycatcher in the higher forest; Birds in the Agama belt have Squash and Baiz Woodpecker.
The squid in the inner mountain stream is some of the local varieties, and others are introduced from the outside. Because the dams and other natural ecological changes, fish are quite common in the mountainous area. Squirts and hard heads have tracered to the mountain river in the spawning season.
Human history
Nevada Mountain (3 photos)
The American Indian in the Nevada Mountains has lived on hunting - collecting life. In addition to capturing quarry, this economical has never had a long-term impact on mountain landscapes. The first batch of Europeans came to the region was Spanish explorer and missionaries. They have arrived in California in the early 18th century, and the impact on the Nashada Mountains is negligible.found that natural gold blocks in the Armeli River (Pleider, California), Plesiville, California, which set off an international gold, not only to California and produced significant changes to the historical evolution of the United States. Influence.
In the first two years, there are about 50,000 miners in the Nevada Mountain. Bank, retail business, transportation facilities, logging industry, agriculture and industrial catering the need for rapid growth in population, such as the spring bamboo shoots and prosperity. This economic development prompted California to join the federal, which fought the first batch of city center in this area, famous such as San Francisco and Sanda. By the 1880 golden era reached the peak, although there are still some mining activities to continue.
Tourism Resources
After the initial simple mine road, there was a construction of regional railways and transverse railways in the 1860s to 70s. In the 1920s, the first batch of paved roads in the Nashard Mountains were built. However, there is still no news or railway in the middle of the mountain. The rapid development of the economy has jeopardized the environment. For example, the Taghu Basin is one of the best beauty in the mountain region. Therefore, there is a tourist attraction that encounters frequent air and water pollution, traffic congestion, sewage treatment, and aesthetic value decline.
The need for water and power (and after the second World War) have changed the face of the Nashada Mountains. The river flowing through the long western slopes 3/4 has been controlled. At the beginning of the 20th century, the first large water conservancy project was Hetchhchchyreservoir, which was built in San Francisco in the River, Jetchhtchchyreservoir, which was built into the river in Jeemite National Park, drowned with views of Nature View Nature Nature. . Recently, the most magnificent water contribution to the Father River (Featherriver, State Water Conservancy) was started in the 1950s and is still under construction until the early 1990s.