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Grouse Creek Block
The Grouse Creek block is a Precambrian basement province of 2.45 to 2.70 billion year old orthogneisses. The Grouse Creek block is one of several Proterozoic and Archean accretion (geology), accreted terranes that lie to the north and west of the Wyoming craton, including the Farmington Canyon Complex (2.6-1.5 Ga). Together, these terranes comprise part of the basement (geology), basement rock of the North American continent and have been critical to studies of crustal accretion in the Precambrian. Ongoing study of the Grouse Creek block will contribute to understanding the paleogeography of the Wyoming craton prior to its incorporation into the supercontinent Laurentia approximately 1.86 billion years ago. The name was proposed by David Foster and others. Geographic and geologic boundaries The location of the Grouse Creek block has been determined at some points by determining the age when minerals were metamorphosed through isotopic analysis of uranium, strontium, neodymium an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Grouse Creek Block Location1
Grouse are a group of birds from the order (biology), order Galliformes, in the family (biology), family Phasianidae. Grouse are presently assigned to the Tribe (biology), tribe Tetraonini (formerly the subfamily Tetraoninae and the family Tetraonidae), a classification supported by mitochondrial DNA sequence studies, and applied by the American Ornithologists' Union, ITIS, International Ornithologists' Union, International Ornithological Congress, and others. Grouse inhabit temperate and subarctic regions of the Northern Hemisphere, from pine trees, pine forests to moorland and mountainside, from 83rd parallel north, 83°N (rock ptarmigan in northern Greenland) to 28th parallel north, 28°N (Attwater's prairie chicken in Texas). Turkey (bird), Turkeys are closely related to grouse and are also classified in the tribe Tetraonini. The koklass pheasant is also closely allied with them. Description Grouse are heavily built like other Galliformes, such as chickens. They range in len ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neodymium
Neodymium is a chemical element with the symbol Nd and atomic number 60. It is the fourth member of the lanthanide series and is considered to be one of the rare-earth metals. It is a hard, slightly malleable, silvery metal that quickly tarnishes in air and moisture. When oxidized, neodymium reacts quickly producing pink, purple/blue and yellow compounds in the +2, +3 and +4 oxidation states. It is generally regarded as having one of the most complex spectra of the elements. Neodymium was discovered in 1885 by the Austrian chemist Carl Auer von Welsbach, who also discovered praseodymium. It is present in significant quantities in the minerals monazite and bastnäsite. Neodymium is not found naturally in metallic form or unmixed with other lanthanides, and it is usually refined for general use. Neodymium is fairly common—about as common as cobalt, nickel, or copper—and is widely distributed in the Earth's crust. Most of the world's commercial neodymium is mined in China, as is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Samarium
Samarium is a chemical element with symbol Sm and atomic number 62. It is a moderately hard silvery metal that slowly oxidizes in air. Being a typical member of the lanthanide series, samarium usually has the oxidation state +3. Compounds of samarium(II) are also known, most notably the monoxide SmO, monochalcogenides SmS, SmSe and SmTe, as well as samarium(II) iodide. The last compound is a common reducing agent in chemical synthesis. Samarium has no significant biological role, and some samarium salts are slightly toxic. Samarium was discovered in 1879 by French chemist Paul-Émile Lecoq de Boisbaudran and named after the mineral samarskite from which it was isolated. The mineral itself was named after a Russian mine official, Colonel Vassili Samarsky-Bykhovets, who thus became the first person to have a chemical element named after him, albeit indirectly. Though classified as a rare-earth element, samarium is the 40th most abundant element in Earth's crust and more common than ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cheyenne Belt
The Cheyenne Belt is the tectonic suture zone between the Archean-age Wyoming craton to the north and the Paleoproterozoic-age Yavapai province to the south. It runs through the southeastern quadrant of the state of Wyoming, United States. It was formed during the Paleoproterozoic Medicine Bow orogeny between 1.78 and 1.74 billion years ago when island arcs collided with the Wyoming craton. This is an example of a convergent boundary in tectonics. Description The exposed geology consists of a series of northeast- striking, steeply-dipping shear zones. These separate Archean crust to the north from 1800 to 1600 million year old ( Ma) to the south. The Wyoming craton north of the belt is an Archean basement with a cover of younger miogeoclinal strata (sedimentary rock deposited on the passive margin of a continent.) The craton is intruded by dikes and sills of tholeiitic basalt with a minimum age of 2000 Ma, and this is take as the time at which the Wyoming craton was rifted from a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ruby Mountains
The Ruby Mountains are a mountain range, primarily located within Elko County with a small extension into White Pine County, in Nevada, United States. Most of the range is included within the Humboldt-Toiyabe National Forest. The range reaches a maximum elevation of on the summit of Ruby Dome. To the north is Secret Pass and the East Humboldt Range, and from there the Rubies run south-southwest for about . To the east lies Ruby Valley, and to the west lie Huntington and Lamoille Valleys. The Ruby Mountains are the only range of an introduced bird, the Himalayan snowcock, in North America. The 'Rubies' were named after the garnets found by early explorers. The central core of the range shows extensive evidence of glaciation during recent ice ages, including U-shaped canyons, moraines, hanging valleys, and steeply carved granite mountains, cliffs, and cirques. All of these features can be seen from 12-mile Lamoille Canyon Road, a National Forest Scenic Byway which traverses L ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wasatch Range
The Wasatch Range ( ) or Wasatch Mountains is a mountain range in the western United States that runs about from the Utah-Idaho border south to central Utah. It is the western edge of the greater Rocky Mountains, and the eastern edge of the Great Basin region.''Hiking the Wasatch'', John Veranth, 1988, Salt Lake City, The northern extension of the Wasatch Range, the Bear River Mountains, extends just into Idaho, constituting all of the Wasatch Range in that state. In the language of the native Ute people, Wasatch means "mountain pass" or "low pass over high range." According to William Bright, the mountains were named for a Shoshoni leader who was named with the Shoshoni term ''wasattsi'', meaning "blue heron". In 1926, Cecil Alter quoted Henry Gannett from 1902, who said that the word meant "land of many waters," then posited, "the word is a common one among the Shoshones, and is given to a berry basket" carried by women. Overview Since the earliest days of European sett ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paleoproterozoic
The Paleoproterozoic Era (;, also spelled Palaeoproterozoic), spanning the time period from (2.5–1.6 Ga), is the first of the three sub-divisions (eras) of the Proterozoic Eon. The Paleoproterozoic is also the longest era of the Earth's geological history. It was during this era that the continents first stabilized. Paleontological evidence suggests that the Earth's rotational rate ~1.8 billion years ago equated to 20-hour days, implying a total of ~450 days per year. Atmosphere Before the enormous increase in atmospheric oxygen, almost all existing lifeforms were anaerobic organisms whose metabolism was based on a form of cellular respiration that did not require oxygen. Free oxygen in large amounts is toxic to most anaerobic organisms. Consequently, most died when the atmospheric free oxygen levels soared in an extinction event called the Great Oxidation Event, which brought atmospheric oxygen levels to up to 10% of their current level. The only creatures that survi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Snake River Plain
image:Snake River view near Twin Falls, Idaho.jpg, The Snake River cutting through the plain leaves many canyons and Canyon#List of gorges, gorges, such as this one near Twin Falls, Idaho The Snake River Plain is a geology, geologic feature located primarily within the U.S. state of Idaho. It stretches about westward from northwest of the state of Wyoming to the Idaho-Oregon border. The plain is a wide, flat bow-shaped depression and covers about a quarter of Idaho. Three major volcanic buttes dot the plain east of Arco, Idaho, Arco, the largest being Big Southern Butte. Most of Idaho's major cities are in the Snake River Plain, as is much of its agricultural land. Geology The Snake River Plain can be divided into three sections: western, central, and eastern. The western Snake River Plain is a large tectonic graben or rift valley filled with several kilometers of lacustrine (lake) sediments; the sediments are underlain by rhyolite and basalt, and overlain by basalt. The w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Grouse Creek Range
Grouse are a group of birds from the order Galliformes, in the family Phasianidae. Grouse are presently assigned to the tribe Tetraonini (formerly the subfamily Tetraoninae and the family Tetraonidae), a classification supported by mitochondrial DNA sequence studies, and applied by the American Ornithologists' Union, ITIS, International Ornithological Congress, and others. Grouse inhabit temperate and subarctic regions of the Northern Hemisphere, from pine forests to moorland and mountainside, from 83°N (rock ptarmigan in northern Greenland) to 28°N ( Attwater's prairie chicken in Texas). Turkeys are closely related to grouse and are also classified in the tribe Tetraonini. The koklass pheasant is also closely allied with them. Description Grouse are heavily built like other Galliformes, such as chickens. They range in length from , and in weight from . Males are larger than females—twice as heavy in the western capercaillie, the largest member of the family. Grouse hav ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
East Humboldt Range
The East Humboldt Range is a mountain range in Elko County, Nevada, United States. It is located along the eastern edge of the upper watershed of the Humboldt River, which flows to the southwest from its source just north of the range. The range reaches a maximum elevation of atop Hole in the Mountain Peak. Most of the range is included within the Ruby Mountains Ranger District of the Humboldt-Toiyabe National Forest. In 1989, the United States Congress passed the Nevada Wilderness Protection Act establishing over of the range as the East Humboldt Wilderness. The range takes its name from the Humboldt River. The name ultimately is derived from the German naturalist Alexander von Humboldt. The East Humboldts run north-to-south for approximately . To the north are Interstate 80 and the community of Wells, while to the south are Secret Pass, the larger Ruby Range, and Ruby Valley. To the east are Clover Valley and U.S. Route 93, and to the west are Starr Valley and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Albion Mountains
The Albion Mountains are a mountain range in the U.S. states of Idaho (~99%) and Utah (~1%), spanning Cassia County, Idaho and barely reaching into Box Elder County, Utah. The highest point in the range is Cache Peak at , and the range is a part of the Basin and Range Province. Most of the mountains are part of the Albion Division of the Minidoka Ranger District of Sawtooth National Forest. The Raft River Mountains are southeast of the range, while the Black Pine Mountains are to the east and the Snake River Plain to the north. The streams in the mountains are in the Snake River watershed, which is a tributary of the Columbia River. The towns of Almo, Elba, and Malta are east of the range, Albion, Burley, and Heyburn are to the north, and Oakley is to the west. There are six alpine lakes in the Albion Mountains. Lake Cleveland is north of Mount Harrison, a small unnamed lake is southeast of Mount Harrison, and the four Independence Lakes are north of Cache Peak. Several roads ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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