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La Plata Fault
The La Plata or Chusma Fault () is a dextral oblique thrust fault in the department of Huila in southwestern Colombia. The fault has a total length of and runs along an average northeast to southwest strike of 039 ± 12 in the Central Ranges of the Colombian Andes. Etymology The fault is named after La Plata, Huila.Paris et al., 2000a, p.57 Description The La Plata or Chusma Fault extends across the eastern slope of the Central Ranges of the Colombian Andes, southeast of the city of Neiva in southwestern Colombia. The fault displaces Triassic, Jurassic and Cretaceous sedimentary rocks, as well as Tertiary volcanic rocks. Coalescent Quaternary alluvial fan deposits are offset by the La Plata Fault. The trace is characterised by old retreated and declined scarps, en-echelon semiparallel associated faults that cut alluvial deposits of the Páez River and local lahar deposits, a well developed topographic fault-line expression, and a probable pull-apart basin filled with Qua ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
La Plata, Huila
La Plata is a town and municipality in the Huila Department, Colombia with a population of 57.381 inhabitants including the rural area at an altitude of 1,050 m. It is located 122 km away from Neiva, 147 km from the city of Popayán and 210 km from the town of San Agustín. The municipality is located in the southwestern part of the department of Huila, in the foothills of the Cordillera Central, is geographically situated at coordinates 2 ° 23'00" North Latitude and 75 ° 56'00" West Longitude. The municipality is bordered on the north by the Cauca Department, on the south by the municipality of La Argentina, on the east by the municipalities of Paicol and Pital and the west by the Cauca Department. History The foundation and establishment as a municipality dates from June 5, 1651 by Captain Diego de Ospina y Maldonado, at which organizes the parish of San Sebastián de La Plata. This foundation is attributed to the passage of Sebastián de Belalcáz ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neiva, Huila
Neiva () is the capital of the Department of Huila. It is located in the valley of the Magdalena River in south central Colombia with a population of about 357,392 inhabitants. It is one of the most important cities in southern Colombia, mainly because of its strategic geographical location. History Neiva was first founded in 1539 by Juan de Cabrera in an area now belonging to the municipality of Campoalegre. In 1550, Juan de Alonso y Arias relocated the city to the place that is now the municipality of Villavieja. At this location, the city was destroyed by indigenous tribes in 1560. The city was founded, at its current location, for the third and final time in 1612 by Diego de Ospina y Medinilla. Neiva became important during the colonial times because of its strategic location. It was located in the trade route that communicated the Viceroyalty of Peru with Bogotá and Caracas. The city was declared as the capital of the Province of Neiva, made up of the Neiva, La Plata, Ti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Earthquakes In Colombia
This is a list of earthquakes in Colombia. Colombia is a seismically active country and has a large seismic risk in many areas of its territory due to its location at the boundaries of the Malpelo, Panama, Caribbean, North Andes (where most earthquakes occurred) and South American Plates along the Pacific Ring of Fire. The southeastern and extreme eastern portions of Colombia are not as seismically active as the rest of the country. The first historically registered earthquake felt in Colombia occurred on September 11, 1530, around 10:00 AM, probably with the epicentre near Cumaná, Venezuela. The earthquake was documented by Gonzalo Fernández de Oviedo y Valdés in his work ''La Historia general de las Indias'' and by friar Bartolomé de las Casas in his book ''Historia de Las Indias''.Ramírez, 1975, p.63 The first documented earthquake with its epicentre in present-day Colombia territory took place in 1566,Ramírez, 1975, p.65 with the epicentre estimated around San ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
El Tiempo (Colombia)
''El Tiempo'' ( en, "Time" or "The Times") is a nationally distributed broadsheet daily newspaper in Colombia launched on January 30th, 1911. , ''El Tiempo'' had the highest circulation in Colombia with an average daily weekday of 1,137,483 readers, rising to 1,921,571 readers for the Sunday edition. From 1913 to 2007, ''El Tiempos main shareholders were members of the Santos Calderón family. Several also participated in Colombian politics: Eduardo Santos Montejo was President of Colombia from 1938 to 1942. Francisco Santos Calderón served as Vice-President (2002–2010). And Juan Manuel Santos as Defense Minister (2006–2009) during Álvaro Uribe's administration; Juan Manuel was elected president of Colombia in 2010 and served in that position until 2018. In 2007, Spanish Grupo Planeta acquired 55% of the ''Casa Editorial El Tiempo'' media group, including the newspaper and its associated TV channel Citytv Bogotá. In 2012, businessman Luis Carlos Sarmiento Angulo bought t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pull-apart Basin
In geology, a basin is a region where subsidence generates accommodation space for the deposition of sediments. A pull-apart basin is a structural basin where two overlapping (en echelon) strike-slip faults or a fault bend creates an area of crustal extension undergoing tension, which causes the basin to sink down. Frequently, the basins are rhombic or sigmoidal in shape. Dimensionally, basins are limited to the distance between the faults and the length of overlap.Frisch, Wolfgang, Martin Meschede, and Ronald C. Blakey. ''Plate tectonics: Continental drift and mountain building''. Springer, 2010. Pull-apart basins are also referred to as overlapping-tension-zones (OTZ). Mechanics and fault configuration The inhomogeneity and structural complexity of continental crust causes faults to deviate from a straight course and frequently causes bends or step-overs in fault paths. Bends and step-overs of adjacent faults become favorable locations for extensional and compressional st ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lahar
A lahar (, from jv, ꦮ꧀ꦭꦲꦂ) is a violent type of mudflow or debris flow composed of a slurry of pyroclastic material, rocky debris and water. The material flows down from a volcano, typically along a river valley. Lahars are extremely destructive: they can flow tens of metres per second, they have been known to be up to deep, and large flows tend to destroy any structures in their path. Notable lahars include those at Mount Pinatubo and Nevado del Ruiz, the latter of which killed thousands of people in the town of Armero. Etymology The word ''lahar'' is of Javanese origin. Berend George Escher introduced it as a geological term in 1922. Description The word ''lahar'' is a general term for a flowing mixture of water and pyroclastic debris. It does not refer to a particular rheology or sediment concentration. Lahars can occur as normal stream flows (sediment concentration of less than 30%), hyper-concentrated stream flows (sediment concentration between 30 and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Páez River
The Páez River (Río Páez ) is a river in southwestern Colombia. It is a tributary of the Magdalena River which drains into the Caribbean Sea. It flows into the Magdalena just south of the village of Remolino del Vicho. Earthquake On 6 June 1994, a 6.4 magnitude earthquake stuck in the Páez River area causing extensive landsliding and resulting in over 1,100 dead and the displacement of almost the entire population of 15 municipalities in the departments of Cauca and Huila. Six bridges and over of roads were destroyed by the landslides. In order to spur development in the Paez River region, Colombia Law 218 of 1995 was passed that granted exemptions on income tax for 10 years for investments made in the departments of Cauca and Huila.Giugale, Marcelo; Lafourcade, Olivier and Luff, Connie (2003) "The Tax System" ''Colombia: the economic foundation of peace'' International Bank for Reconstruction and Development (World Bank The World Bank is an international financial ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fault Scarp
A fault scarp is a small step or offset on the ground surface where one side of a fault has moved vertically with respect to the other. It is the topographic expression of faulting attributed to the displacement of the land surface by movement along faults. They are exhibited either by differential movement and subsequent erosion along an old ''inactive'' geologic fault (a sort of old rupture), or by a movement on a recent active fault. Characteristics Fault scarps often contain highly fractured rock of both hard and weak consistency. In many cases, bluffs form from the upthrown block and can be very steep. The height of the scarp formation is equal to the vertical displacement along the fault. Active scarps are usually formed by tectonic displacement, e.g. when an earthquake changes the elevation of the ground and can be caused by any type of fault, including strike-slip faults, whose motion is primarily horizontal. This movement is usually episodic, with the height of the bluf ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alluvial Fan
An alluvial fan is an accumulation of sediments that fans outwards from a concentrated source of sediments, such as a narrow canyon emerging from an escarpment. They are characteristic of mountainous terrain in arid to semiarid climates, but are also found in more humid environments subject to intense rainfall and in areas of modern glaciation. They range in area from less than to almost . Alluvial fans typically form where flow emerges from a confined channel and is free to spread out and infiltrate the surface. This reduces the carrying capacity of the flow and results in deposition of sediments. The flow can take the form of infrequent debris flows or one or more ephemeral or perennial streams. Alluvial fans are common in the geologic record, such as in the Triassic basins of eastern North America and the New Red Sandstone of south Devon. Such fan deposits likely contain the largest accumulations of gravel in the geologic record. Alluvial fans have also been found on Ma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Volcanic Rock
Volcanic rock (often shortened to volcanics in scientific contexts) is a rock formed from lava erupted from a volcano. In other words, it differs from other igneous rock by being of volcanic origin. Like all rock types, the concept of volcanic rock is artificial, and in nature volcanic rocks grade into hypabyssal and metamorphic rocks and constitute an important element of some sediments and sedimentary rocks. For these reasons, in geology, volcanics and shallow hypabyssal rocks are not always treated as distinct. In the context of Precambrian shield geology, the term "volcanic" is often applied to what are strictly metavolcanic rocks. Volcanic rocks and sediment that form from magma erupted into the air are called "volcaniclastics," and these are technically sedimentary rocks. Volcanic rocks are among the most common rock types on Earth's surface, particularly in the oceans. On land, they are very common at plate boundaries and in flood basalt provinces. It has been est ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tertiary
Tertiary ( ) is a widely used but obsolete term for the geologic period from 66 million to 2.6 million years ago. The period began with the demise of the non- avian dinosaurs in the Cretaceous–Paleogene extinction event, at the start of the Cenozoic Era, and extended to the beginning of the Quaternary glaciation at the end of the Pliocene Epoch. The time span covered by the Tertiary has no exact equivalent in the current geologic time system, but it is essentially the merged Paleogene and Neogene periods, which are informally called the Early Tertiary and the Late Tertiary, respectively. The Tertiary established the Antarctic as an icy island continent. Historical use of the term The term Tertiary was first used by Giovanni Arduino during the mid-18th century. He classified geologic time into primitive (or primary), secondary, and tertiary periods based on observations of geology in Northern Italy. Later a fourth period, the Quaternary, was applied. In the early ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sedimentary Rock
Sedimentary rocks are types of rock that are formed by the accumulation or deposition of mineral or organic particles at Earth's surface, followed by cementation. Sedimentation is the collective name for processes that cause these particles to settle in place. The particles that form a sedimentary rock are called sediment, and may be composed of geological detritus (minerals) or biological detritus (organic matter). The geological detritus originated from weathering and erosion of existing rocks, or from the solidification of molten lava blobs erupted by volcanoes. The geological detritus is transported to the place of deposition by water, wind, ice or mass movement, which are called agents of denudation. Biological detritus was formed by bodies and parts (mainly shells) of dead aquatic organisms, as well as their fecal mass, suspended in water and slowly piling up on the floor of water bodies ( marine snow). Sedimentation may also occur as dissolved minerals precipita ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
