|
Hawkins Peak (California)
Hawkins Peak is a mountain summit located in Alpine County, California, Alpine County, California, United States. Description This landmark of Hope Valley (California), Hope Valley is set south of South Lake Tahoe, California, South Lake Tahoe, on land managed by Humboldt–Toiyabe National Forest. Hawkins Peak is situated in the Sierra Nevada mountain range, with precipitation Surface runoff, runoff from the peak draining into tributaries of the West Fork Carson River. Topographic relief is significant as the north aspect rises above California State Route 88 at West Carson Canyon in two miles. The nearest higher neighbor is Stevens Peak (California), Stevens Peak, to the west across Hope Valley. History In 1833, Joseph R. Walker's expedition passed through the gap between Hawkins Peak and Markleeville Peak to the south. The United States Geological Survey surveyed this area in 1889 and labelled this geographic feature on their 1893 Markleeville quadrangle map. This landfo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carson Pass
Carson Pass is a mountain pass on the crest of the central Sierra Nevada, in the Eldorado National Forest and Alpine County, eastern California. The pass is traversed by California State Route 88. It lies on the Great Basin Divide, with the West Fork Carson River on the east and the South Fork American River on the west. The historic pass was a point on the Carson Trail during the California Gold Rush and was used for American Civil War shipping to California until the completion of the First transcontinental railroad. The Pacific Crest Trail traverses the Carson Pass summit, which has California Historical Landmark #315 at CA 88 postmile 6.09 where Kit Carson carved his name into a tree. History The 1844 Frémont Expedition turned south from northern Nevada. When encamped at Nevada's Carson Valley on January 31, 1844, Frémont decided to detour west during the winter conditions to Sutter's Fort in California for supplies. Local Washoe Indians told them of a route th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carson River
The Carson River is a northwestern Nevada river that empties into the Carson Sink, an endorheic basin. The main stem of the river is long although the addition of the East Fork makes the total length , traversing five counties: Alpine County in California and Douglas, Storey, Lyon, and Churchill Counties in Nevada, as well as the Consolidated Municipality of Carson City, Nevada. The river is named for Kit Carson, who guided John C. Frémont's expedition westward up the Carson Valley and across Carson Pass in winter, 1844. The river made the National Priorities List (NPL) on October 30, 1990 as the Carson River Mercury Superfund site (CRMS) due to investigations that showed trace amounts of mercury in the wildlife and watershed sediments. History Archaeological findings place the eastern border for the prehistoric Martis people in the Reno/Carson River area, these are thought to be the first humans to enter the area about 12,000 years ago. By the early 1800s, the N ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Three-thousanders Of The United States
Three-thousanders are mountains with a height of between , but less than above sea level. Similar terms are commonly used for mountains of other height brackets e. g. four-thousanders or eight-thousanders. In Britain, the term refers to mountains above . Climatological significance In temperate latitudes three-thousanders play an important role, because even in summer they lie below the zero degree line for weeks. Thus the chains of three-thousanders always form important climatic divides and support glaciation - in the Alps the contour is roughly the general limit of the "nival step"; only a few glaciated mountains are under (the Dachstein, the easternmost glaciated mountain in the Alps, is, at , not a three-thousander). In the Mediterranean, however, the three-thousanders remain free of ice and, in the tropics, they are almost insignificant from a climatic perspective; here the snow line lies at around to , and in the dry continental areas (Trans-Himalayas, Andes) it m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Round Top (Alpine County, California)
Round Top is a mountain located on the Sierra crest in Alpine County, California, United States. Its summit is the highest point in Eldorado National Forest and the Mokelumne Wilderness. The mountain lies just south of Carson Pass. With of topographic prominence, prominence, Round Top is the 16th most prominent mountain in the Sierra Nevada. Geology Round Top is the remnant of a volcano that formed in the Miocene epoch, which lasted from 23 million years ago to 5 million years ago. Most of the mountain's vertical height consists of an intrusive rock, intrusive volcanic plug formed of basaltic andesite. This intrusive structure formed under the volcano's surface as subsurface magma gradually cooled and solidified. Approximately is exposed by the northern wall of Summit City canyon, which forms the south face of the mountain. A strong magnetic anomaly in the vicinity indicates that this plug further extends far below the canyon floor. The upper layers of the mountain are mad ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Markleeville
Markleeville (formerly Markleville) is a census-designated place (CDP) in and the county seat of Alpine County, California, United States. The population was 191 at the 2020 census, down from 210 at the 2010 census. History Jacob J. Marklee founded a toll bridge crossing the Carson River in 1861. He aimed to tap into the traffic from the silver mining boom at Silver Mountain City. On June 23, 1862, he recorded a land claim of 160 acres in Douglas County, Nevada. A boundary survey took place, and the property ended up being in California. In 1863, Marklee died after being involved in a gunfight. When the Comstock Lode discovery took place, the town of Markleeville was founded on the Marklee property. Today, the Alpine County Courthouse sits on the former property, which is listed as a California Historical Landmark. A post office opened in Markleeville in 1863. Geography According to the United States Census Bureau, the CDP has a total area of , all land. The region comprising ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Volcanic
A volcano is commonly defined as a vent or fissure in the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface. On Earth, volcanoes are most often found where tectonic plates are diverging or converging, and because most of Earth's plate boundaries are underwater, most volcanoes are found underwater. For example, a mid-ocean ridge, such as the Mid-Atlantic Ridge, has volcanoes caused by divergent tectonic plates whereas the Pacific Ring of Fire has volcanoes caused by convergent tectonic plates. Volcanoes resulting from divergent tectonic activity are usually non-explosive whereas those resulting from convergent tectonic activity cause violent eruptions."Mid-ocean ridge tectonics, volcanism and geomorphology." Geology 26, no. 455 (2001): 458. https://macdonald.faculty.geol.ucsb.edu/papers/Macdonald%20Mid-Ocean%20Ridge%20Tectonics.pdf Volcanoes can also form where there is stretching a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Orographic Lift
Orographic lift occurs when an air mass is forced from a low elevation to a higher elevation as it moves over rising terrain. As the air mass gains altitude it quickly cools down adiabatically, which can raise the relative humidity to 100% and create clouds and, under the right conditions, precipitation. Orographic lifting can have a number of effects, including precipitation, rain shadowing, leeward winds, and associated clouds. Precipitation Precipitation induced by orographic lift occurs in many places throughout the world. Examples include: * The Mogollon Rim in central Arizona * The western slope of the Sierra Nevada range in California. * The western slope of the Wasatch Range in Utah. Specifically the Little and Big Cottonwood Canyons. * The mountains near Baja California North – specifically La Bocana to Laguna Hanson. * The windward slopes of Khasi and Jayantia Hills (see Mawsynram) in the state of Meghalaya in India. * The Western Highlands of Yemen, which rece ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pacific Ocean
The Pacific Ocean is the largest and deepest of Earth's five Borders of the oceans, oceanic divisions. It extends from the Arctic Ocean in the north to the Southern Ocean, or, depending on the definition, to Antarctica in the south, and is bounded by the continents of Asia and Australia in the west and the Americas in the east. At in area (as defined with a southern Antarctic border), the Pacific Ocean is the largest division of the World Ocean and the hydrosphere and covers approximately 46% of Earth's water surface and about 32% of the planet's total surface area, larger than its entire land area ().Pacific Ocean . ''Encyclopædia Britannica, Britannica Concise.'' 2008: Encyclopædia Britannica, Inc. The centers of both the Land and water hemispheres, water hemisphere and the Western Hemisphere, as well as the Pole of inaccessi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Weather Front
A weather front is a boundary separating air masses for which several characteristics differ, such as air density, wind, temperature, and humidity. Disturbed and unstable weather due to these differences often arises along the boundary. For instance, cold fronts can bring bands of thunderstorms and cumulonimbus precipitation or be preceded by squall lines, while warm fronts are usually preceded by stratiform precipitation and fog. In summer, subtler humidity gradients known as dry lines can trigger severe weather. Some fronts produce no precipitation and little cloudiness, although there is invariably a wind shift. Cold fronts generally move from west to east, whereas warm fronts move poleward, although any direction is possible. Occluded fronts are a hybrid merge of the two, and stationary fronts are stalled in their motion. Cold fronts and cold occlusions move faster than warm fronts and warm occlusions because the dense air behind them can lift as well as push the warme ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Encyclopædia Britannica
The is a general knowledge, general-knowledge English-language encyclopaedia. It has been published by Encyclopædia Britannica, Inc. since 1768, although the company has changed ownership seven times. The 2010 version of the 15th edition, which spans 32 volumes and 32,640 pages, was the last printed edition. Since 2016, it has been published exclusively as an online encyclopedia, online encyclopaedia. Printed for 244 years, the ''Britannica'' was the longest-running in-print encyclopaedia in the English language. It was first published between 1768 and 1771 in Edinburgh, Scotland, in three volumes. The encyclopaedia grew in size; the second edition was 10 volumes, and by its fourth edition (1801–1810), it had expanded to 20 volumes. Its rising stature as a scholarly work helped recruit eminent contributors, and the 9th (1875–1889) and Encyclopædia Britannica Eleventh Edition, 11th editions (1911) are landmark encyclopaedias for scholarship and literary ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alpine Climate
Alpine climate is the typical climate for elevations above the tree line, where trees fail to grow due to cold. This climate is also referred to as a mountain climate or highland climate. Definition There are multiple definitions of alpine climate. In the Köppen climate classification, the alpine and mountain climates are part of group ''E'', along with the polar climate, where no month has a mean temperature higher than . According to the Holdridge life zone system, there are two mountain climates which prevent tree growth : a) the alpine climate, which occurs when the mean biotemperature of a location is between . The alpine climate in Holdridge system is roughly equivalent to the warmest tundra climates (ET) in the Köppen system. b) the alvar climate, the coldest mountain climate since the biotemperature is between 0 °C and 1.5 °C (biotemperature can never be below 0 °C). It corresponds more or less to the coldest tundra climates and to the ice cap cli ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Köppen Climate Classification
The Köppen climate classification divides Earth climates into five main climate groups, with each group being divided based on patterns of seasonal precipitation and temperature. The five main groups are ''A'' (tropical), ''B'' (arid), ''C'' (temperate), ''D'' (continental), and ''E'' (polar). Each group and subgroup is represented by a letter. All climates are assigned a main group (the first letter). All climates except for those in the ''E'' group are assigned a seasonal precipitation subgroup (the second letter). For example, ''Af'' indicates a tropical rainforest climate. The system assigns a temperature subgroup for all groups other than those in the ''A'' group, indicated by the third letter for climates in ''B'', ''C'', ''D'', and the second letter for climates in ''E''. Other examples include: ''Cfb'' indicating an oceanic climate with warm summers as indicated by the ending ''b.'', while ''Dwb'' indicates a semi-Monsoon continental climate, monsoonal continental climate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
