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Vadito Group
The Vadito Group is a group of geologic formations that crops out in most of the Precambrian-cored uplifts of northern New Mexico. Detrital zircon geochronology and radiometric dating give a consistent age of 1700 Mya for the group, corresponding to the Statherian period. Description The Vadito Group is an extensive sequence of supracrustal rocks dominated by feldspathic gneisses, feldspathic schists, and metamorphosed sandstones and conglomerates. Its lower section includes amphibolites, though mafic beds make up less than 10% of the unit. It is found in the Picuris Mountains, the Tusas Mountains, the Truchas Range, the Mora River area, the Rincon Mountains (), the northern Taos Range, and in the Cimarron Range. Detrital zircon geochronology establishes that the principal source regions for the sediments that became the Vadito Group had ages of 1765 to 1704 Mya. The absolute age of the Burned Mountain Formation constituting the upper part of the Vadito Group in the Tus ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Picuris Mountains
The Picuris Mountains are a mountain range in northern New Mexico. They are considered a subrange of the Sangre de Cristo Mountains. Geography The mountains are located to the east of Dixon and surround Picuris Pueblo to the west, north, and east. The range resembles a triangle with its base to the east, along the valley of the Rio Grande del Rancho. The northwest face lies along the valley of the Rio Grande and the southern face lies along Rio Pueblo and Embudo Creek. History The area was first visited by Europeans on July 13, 1598, when Juan de Oñate visited Picuris Pueblo. Geology The range is underlain by Precambrian rock beds of the Hondo Group and Vadito Group. It is the namesake for the Picuris orogeny. Economy Mining has been historically important in the Picuris Mountains. The Harding Pegmatite Mine was operated off and on from about 1900 to 1958, when it was donated to the University of New Mexico as an outdoor geological laboratory. At one time, the mine made ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Statherian
The Statherian Period (; grc, σταθερός, statherós, meaning "stable, firm") is the final geologic period in the Paleoproterozoic Era and lasted from Mya to Mya (million years ago). Instead of being based on stratigraphy, these dates are defined chronometrically. The period was characterized on most continents by either new platforms or final cratonization of fold belts. Oxygen levels were 10% to 20% of current values. ''Rafatazmia'', controversially claimed to be present in Statherian beds in India, may be the oldest known confirmably eukaryotic fossil organism. By the beginning of the Statherian, the supercontinent Columbia had assembled. At roughly 1.7 billion years before present a series of natural nuclear fission reactors was operational in what is now Oklo Oklo is a region near the town of Franceville, in the Haut-Ogooué province of the Central African country of Gabon. Several natural nuclear fission reactors were discovered in the uranium mines in th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mya (unit)
Mya may refer to: Brands and product names * Mya (program), an intelligent personal assistant created by Motorola * Mya (TV channel), an Italian Television channel * Midwest Young Artists, a comprehensive youth music program Codes * Burmese language, ISO 639-3 code is * Moruya Airport's IATA code * The IOC, license plate, and UNDP country code for Myanmar ("MYA") People * Mya (given name) * Mya (singer) (Mya Marie Harrison, born 1979), an American R&B singer-songwriter and actress * Bo Mya (1927–2006), nom de guerre of a Myanmar rebel leader, chief rapist of the Karen National Union Other uses * ''Mýa'' (album), a 1998 album by Mýa * ''Mya'' (bivalve), a genus of soft-shell clams * MYA (unit) for "million years ago", a science-related unit of time used in astronomy, geology and biology See also * A (motor yacht) (M/Y A), a superyacht * Maia (other) * Maya (other) Maya may refer to: Civilizations * Maya peoples, of southern Mexico and norther ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sangre De Cristo Mountains
) , country= United States , subdivision1_type= States , subdivision1= , parent= Rocky Mountains , geology= , orogeny= , area_mi2= 17193 , range_coordinates= , length_mi= 242 , length_orientation= north-south , width_mi= 120 , width_orientation= east-west , highest= Blanca Peak , elevation_ft= 14351 , coordinates= , highest_location= East of Alamosa, Colorado , map= , map_size= , map_caption= The Sangre de Cristo Mountains (Spanish for "Blood of Christ") are the southernmost subrange of the Rocky Mountains. They are located in southern Colorado and northern New Mexico in the United States. The mountains run from Poncha Pass in South-Central Colorado, trending southeast and south, ending at Glorieta Pass, southeast of Santa Fe, New Mexico. The mountains contain a number of fourteen thousand foot peaks in the Colorado portion, as well as all the peaks in New Mexico which are over twelve thousand feet. The name of the mountains may refer to the occasion ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taos Mountains
) , country= United States , subdivision1_type= States , subdivision1= , parent= Rocky Mountains , geology= , orogeny= , area_mi2= 17193 , range_coordinates= , length_mi= 242 , length_orientation= north-south , width_mi= 120 , width_orientation= east-west , highest= Blanca Peak , elevation_ft= 14351 , coordinates= , highest_location= East of Alamosa, Colorado , map= , map_size= , map_caption= The Sangre de Cristo Mountains (Spanish for "Blood of Christ") are the southernmost subrange of the Rocky Mountains. They are located in southern Colorado and northern New Mexico in the United States. The mountains run from Poncha Pass in South-Central Colorado, trending southeast and south, ending at Glorieta Pass, southeast of Santa Fe, New Mexico. The mountains contain a number of fourteen thousand foot peaks in the Colorado portion, as well as all the peaks in New Mexico which are over twelve thousand feet. The name of the mountains may refer to the occasi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mora River
Mora River, also known as Rio Mora, is a stream in Mora and San Miguel County, New Mexico. Its headwaters are on Osha Mountain of the Sangre de Cristo Mountains. The river flows downstream primarily through private land, but there are areas for fishing brown and rainbow trout below on public land in the town of Mora. It is a tributary of Canadian River. It was called ''Rio Mora'' or ''Rio de lo de Mora'' on early maps. There is a separate stream ''Rio Mora'' that is a tributary of Pecos River. Course The headwaters are located in the Sangre de Cristo Mountains near Chacon. The stream flows south through Mora, east through La Cueva and Watrous to the confluence at Canadian River, north of Sabinoso. Tributaries Coyote Creek, which runs through Coyote Creek State Park, is a tributary of Mora River. See also * List of rivers of New Mexico A ''list'' is any set of items in a row. List or lists may also refer to: People * List (surname) Organizations * List College, an und ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Truchas Peak
Truchas Peak (more precisely, South Truchas Peak) is the second highest peak in the U.S. State of New Mexico behind Wheeler Peak. It is in the Sangre de Cristo Mountains northeast of Santa Fe. It lies within the Pecos Wilderness, part of the Santa Fe National Forest. (The north end of the mountain borders on the Carson National Forest.) The name of the peak is Spanish for "trout" (plural). It is the highest point in both Rio Arriba and Mora counties. It is also the most southerly peak and land area in the continental United States to rise above . The entire mountain is a small north-south trending massif with four identifiable summits, North Truchas Peak, Middle Truchas Peak, "Medio Truchas Peak" (unofficial name), and South Truchas Peak, the highest. Of the three subsidiary summits, only North Truchas Peak () has enough topographic prominence (about ) to be considered an independent peak. The Truchas Peaks lie on the divide between the Rio Grande and the Pecos River. They ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amphibolite
Amphibolite () is a metamorphic rock that contains amphibole, especially hornblende and actinolite, as well as plagioclase feldspar, but with little or no quartz. It is typically dark-colored and dense, with a weakly foliated or schistose (flaky) structure. The small flakes of black and white in the rock often give it a salt-and-pepper appearance. Amphibolite frequently forms by metamorphism of mafic igneous rocks, such as basalt. However, because metamorphism creates minerals entirely based upon the chemistry of the protolith, certain 'dirty marls' and volcanic sediments may also metamorphose to an amphibolite assemblage. Deposits containing dolomite and siderite also readily yield amphibolite (tremolite-schist, grunerite-schist, and others) especially where there has been a certain amount of contact metamorphism by adjacent granitic masses. Metamorphosed basalt (metabasalt) creates ''ortho-amphibolite'' and other chemically appropriate lithologies create ''para-amphibolite''. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Conglomerate (geology)
Conglomerate () is a clastic sedimentary rock that is composed of a substantial fraction of rounded to subangular gravel-size clasts. A conglomerate typically contains a matrix of finer-grained sediments, such as sand, silt, or clay, which fills the interstices between the clasts. The clasts and matrix are typically cemented by calcium carbonate, iron oxide, silica, or hardened clay. Conglomerates form by the consolidation and lithification of gravel. They can be found in sedimentary rock sequences of all ages but probably make up less than 1 percent by weight of all sedimentary rocks. In terms of origin and depositional mechanisms, they are closely related to sandstones and exhibit many of the same types of sedimentary structures, e.g., tabular and trough cross-bedding and graded bedding.Boggs, S. (2006) ''Principles of Sedimentology and Stratigraphy.'', 2nd ed. Prentice Hall, New York. 662 pp. Friedman, G.M. (2003) ''Classification of sediments and sedimentary rocks.'' In G ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sandstone
Sandstone is a clastic sedimentary rock composed mainly of sand-sized (0.0625 to 2 mm) silicate grains. Sandstones comprise about 20–25% of all sedimentary rocks. Most sandstone is composed of quartz or feldspar (both silicates) because they are the most resistant minerals to weathering processes at the Earth's surface. Like uncemented sand, sandstone may be any color due to impurities within the minerals, but the most common colors are tan, brown, yellow, red, grey, pink, white, and black. Since sandstone beds often form highly visible cliffs and other topographic features, certain colors of sandstone have been strongly identified with certain regions. Rock formations that are primarily composed of sandstone usually allow the percolation of water and other fluids and are porous enough to store large quantities, making them valuable aquifers and petroleum reservoirs. Quartz-bearing sandstone can be changed into quartzite through metamorphism, usually related to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Metamorphosed
Metamorphic rocks arise from the transformation of existing rock to new types of rock in a process called metamorphism. The original rock (protolith) is subjected to temperatures greater than and, often, elevated pressure of or more, causing profound physical or chemical changes. During this process, the rock remains mostly in the solid state, but gradually recrystallizes to a new texture or mineral composition. The protolith may be an igneous, sedimentary, or existing metamorphic rock. Metamorphic rocks make up a large part of the Earth's crust and form 12% of the Earth's land surface. They are classified by their protolith, their chemical and mineral makeup, and their texture. They may be formed simply by being deeply buried beneath the Earth's surface, where they are subject to high temperatures and the great pressure of the rock layers above. They can also form from tectonic processes such as continental collisions, which cause horizontal pressure, friction, and distorti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Schist
Schist ( ) is a medium-grained metamorphic rock showing pronounced schistosity. This means that the rock is composed of mineral grains easily seen with a low-power hand lens, oriented in such a way that the rock is easily split into thin flakes or plates. This texture (geology), texture reflects a high content of platy minerals, such as micas, talc, chlorite group, chlorite, or graphite. These are often interleaved with more granular minerals, such as feldspar or quartz. Schist typically forms during regional metamorphism accompanying the process of mountain building (orogeny) and usually reflects a medium Metamorphism#Metamorphic grades, grade of metamorphism. Schist can form from many different kinds of rocks, including sedimentary rocks such as mudstones and igneous rocks such as tuffs. Schist metamorphosed from mudstone is particularly common and is often very rich in mica (a ''mica schist''). Where the type of the original rock (the protolith) is discernible, the schist is us ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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