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List Of Impact Craters In South America
This list includes all 11 confirmed impact craters in South America as listed in the Earth Impact Database. These features were caused by the collision of large meteorites or comets with the Earth. For eroded or buried craters, the stated diameter typically refers to an estimate of original rim diameter, and may not correspond to present surface features. Confirmed impact craters Unconfirmed impact craters The following craters are officially considered "unconfirmed" because they are not listed in the Earth Impact Database. Due to stringent requirements regarding evidence and peer-reviewed publication, newly discovered craters or those with difficulty collecting evidence generally are known for some time before becoming listed. However, entries on the unconfirmed list could still have an impact origin disproven. See also * Impact craters * Impact events * Bolides and Meteorites * Earth Impact Database – primary source * Traces of Catastrophe book from Lunar and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Impact Craters On Earth
This list of impact craters on Earth contains a selection of the 190 confirmed craters given in the Earth Impact Database as of 2017. To keep the lists manageable, only the largest craters within a time period are included. Alphabetical lists for different continents can be found under Craters by continent below. Confirmed impact craters listed by size and age These features were caused by the collision of meteors (consisting of large fragments of asteroids) or comets (consisting of ice, dust particles and rocky fragments) with the Earth. For eroded or buried craters, the stated diameter typically refers to the best available estimate of the original rim diameter, and may not correspond to present surface features. Time units are either in ka (thousands) or Ma (millions) of years. 10 ka or less Less than ten thousand years old, and with a diameter of or more. The EID lists fewer than ten such craters, and the largest in the last 100,000 years (100 ka) is the Rio Cuarto c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Argentina
Argentina (), officially the Argentine Republic ( es, link=no, República Argentina), is a country in the southern half of South America. Argentina covers an area of , making it the second-largest country in South America after Brazil, the fourth-largest country in the Americas, and the eighth-largest country in the world. It shares the bulk of the Southern Cone with Chile to the west, and is also bordered by Bolivia and Paraguay to the north, Brazil to the northeast, Uruguay and the South Atlantic Ocean to the east, and the Drake Passage to the south. Argentina is a federal state subdivided into twenty-three provinces, and one autonomous city, which is the federal capital and largest city of the nation, Buenos Aires. The provinces and the capital have their own constitutions, but exist under a federal system. Argentina claims sovereignty over the Falkland Islands, South Georgia and the South Sandwich Islands, and a part of Antarctica. The earliest recorded human prese ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cerro Do Jarau Crater
Cerro do Jarau crater is a diameter circular feature in the Paraná Basin, Rio Grande do Sul in southern Brazil, close to the border with Uruguay. The Russian Academy of Sciences lists the structure as a probable impact crater.Mikheeva, 2017 Description Cerro do Jarau is a prominent, approximately wide, circular landform rising more than above the plains of the pampas in southern Brazil. The name (meaning Jarau hills) comes from the prominent crests of silicified sandstones, which form a semiring of elevated hills in the northern part of the structure. The origin of this structure has been debated for decades, and varied suggestions of its formation include either endogenous tectonic processes or large meteorite impact. However, no conclusive evidence to support either hypothesis has been presented to date. This structure was formed in Mesozoic volcano-sedimentary rocks of the Paraná Basin and consists of the Jurassic to Cretaceous Guará (sandstones), Botucatu (sandstones) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vista Alegre Crater
The Vista Alegre crater is a meteorite crater in Coronel Vivida, Paraná State, Brazil. On the surface it appears as a circular, relatively flat plain within otherwise hilly terrain. Description It is in diameter and the age is estimated to be less than 65 million years (Paleocene The Paleocene, ( ) or Palaeocene, is a geological epoch (geology), epoch that lasted from about 66 to 56 mya (unit), million years ago (mya). It is the first epoch of the Paleogene Period (geology), Period in the modern Cenozoic Era (geology), E ... or younger). More recently, a date of about 115 Ma has been givenA. Crósta, M. Vasconcelos (2013)Update On The Current Knowledge Of The Brazilian Impact Craters 44th Lunar and Planetary Science Conference (2013) and closer to the age of Vargeão Dome. Considering the proximity of location, age, and stratigraphic similarities of Vista Alegre and Vargeão, it has been proposed that it was a double impact.A. Crósta, C. Kazzuo-Vieira and A. Schrank ( ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vargeão Dome
Vargeão Dome is a meteorite crater in Santa Catarina State, Brazil, straddling the municipalities of Vargeão, Faxinal dos Guedes, and Passos Maia. The crater is an almost perfectly circular depression with steep walls, in diameter and up to deep, relative to its rim. It is of Early Cretaceous age, or about 123 ± 2 Ma. The meteorite impacted on the basaltic rocks of the Serra Geral Formation (Jurassic/Cretaceous). The crater displays several concentric rings and radial faults, and an eroded central bulge. The latter consists of impact breccias and sandstones from the Botucatu/ Pirambóia Formation (Cretaceous/Triassic), which have been displaced about above their mean depth in the surrounding area. At least four post-impact lava flows have been identified between the rim and core. The impact origin of the structure is attested by the presence of shatter cones and shocked quartz grains. Discovery and studies In 1978, Brazilian geologists A. Paiva Filho, C.A.V. Andrad ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Serra Da Cangalha
Serra da Cangalha is an impact crater in the State of Tocantins, near the border of Maranhão State, in north/northeastern Brazil. The crater is between in diameter, making it the second-largest known crater in Brazil. Its age is estimated to be about 220 million years (Triassic period). The name means ''Pack-Saddle Mountains'' in Portuguese. Description The outer perimeter is a circular inward scarp about in diameter on the largely undisturbed Cretaceous and upper Silurian sediments of the Parnaíba basin, breached on the west, north, and south sides by drainage valleys. Within the perimeter there is a series of concentric circular valleys and a central basin, all at roughly the same elevation, separated by ring walls. Shuttle Radar Topography Mission imagery shows a faint ring about in diameter, a second ring of gentle hills about in diameter, and an inner ring of steeper hills, about in diameter and up to high, open to the northwest, surrounding a central basin abou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Santa Marta Crater
Santa Marta crater is a newly confirmed impact crater in Piauí State, northeastern Brazil. It is in diameter and it is estimated to have formed between 100 and 66 Ma, during the Late Cretaceous. Description Its impact origin was first proposed by S. Master and J. Heymann in 2000 based primarily on satellite remote sensing data and was confirmed more than a decade later after conclusive evidence of shock metamorphism such as breccia and shatter cones were found.A. P. Crósta and M. A. Vasconcelos (2013)Confirmation Of The Impact Origin Of The Santa Marta Crater, Brazil 76th Annual Meteoritical Society Meeting See also * Umm al Binni lake Umm al Binni lake is a mostly dry lake within the Central Marshes in Maysan Governorate in southern Iraq. The wide lake is approximately northwest of the Tigris–Euphrates confluence. Because of its shape, location, and other details, it was f ... References Impact craters of Brazil Cretaceous impact craters Cretaceous Braz ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rio Cuarto Craters
Rio or Río is the Portuguese, Spanish, Italian, and Maltese word for "river". When spoken on its own, the word often means Rio de Janeiro, a major city in Brazil. Rio or Río may also refer to: Geography Brazil * Rio de Janeiro * Rio do Sul, a town in the state of Santa Catarina, Brazil Mexico * Río Bec, a Mayan archaeological site in Mexico * Río Bravo, Tamaulipas, a city in Mexico United States * Rio, a location in Deerpark, New York, US * Rio, Florida, a census-designated place in Martin County, US * Rio, Georgia, an unincorporated community in Spalding County, US * Rio, Illinois, a village in Knox County, US * Rio, Virginia, a community in Albemarle County, US * Rio, West Virginia, a village in Hampshire County, US * Rio, Wisconsin, a village in Columbia County, US * El Río, Las Piedras, Puerto Rico, a barrio * Río Arriba, Añasco, Puerto Rico, a barrio * Río Arriba, Arecibo, Puerto Rico, a barrio * Río Arriba, Fajardo, Puerto Rico, a barrio * Río Arriba, Vega Baja, Pu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Riachão Ring
Riachão Ring is a meteorite impact crater in Brazil. It lies within the Parnaíba Basin. It is in diameter and the age is estimated to be less than 200 million years (Jurassic or younger). The crater is exposed at the surface. The structure was first identified from analysis of orbital photographs acquired during the Apollo–Soyuz Test Project in 1975. A reconnaissance investigation of the structure was reported by J. F. McHone in 1977. The structure of the site (dipping breccia along the rim) supported interpretation of an impact origin, but no shatter cones or shocked quartz were found at the time. The crater is severely eroded and there is apparently no ejecta remaining. The crater rim rises about 50 m above the surrounding surface, and a central uplift is about 30 m above the annular depression within the rim. Shock deformation has been identified in quartz grains within the central uplift. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chile
Chile, officially the Republic of Chile, is a country in the western part of South America. It is the southernmost country in the world, and the closest to Antarctica, occupying a long and narrow strip of land between the Andes to the east and the Pacific Ocean to the west. Chile covers an area of , with a population of 17.5 million as of 2017. It shares land borders with Peru to the north, Bolivia to the north-east, Argentina to the east, and the Drake Passage in the far south. Chile also controls the Pacific islands of Juan Fernández, Isla Salas y Gómez, Desventuradas, and Easter Island in Oceania. It also claims about of Antarctica under the Chilean Antarctic Territory. The country's capital and largest city is Santiago, and its national language is Spanish. Spain conquered and colonized the region in the mid-16th century, replacing Inca rule, but failing to conquer the independent Mapuche who inhabited what is now south-central Chile. In 1818, after declaring in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Monturaqui Crater
Monturaqui is an impact crater in Chile. It lies south of the Salar de Atacama and was formed 663,000 ± 90,000 years ago by the impact of an IAB meteorite. It is wide and deep and contains a salt pan. Only a few remnants of the meteorite that formed the crater have been collected, with most of the rocks being of local origin. The crater was discovered in 1962 and identified as an impact crater in 1966. Human history The crater was first suspected to be an impact crater in 1962, when it was found on aerial images. After geologic research on the site found evidence of the impact event, it was identified as an impact crater in 1966. The crater has not been drilled. Its name is derived from the mountain range where it is located and from the town of Monturaqui . The closest town is Peine, northeast of the crater. An old Inka road, which goes from the Pacific Ocean to San Pedro de Atacama and further to Argentina, runs from the crater. The crater has been deemed by Stanis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
