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Vianí Fault
The Vianí Fault () is a dextral oblique thrust fault in the department of Cundinamarca in central Colombia. The fault has a total length of and runs along an average northwest to southeast strike of 055.5 ± 15 in the Eastern Ranges of the Colombian Andes. Etymology The fault is named after Vianí, Cundinamarca.Paris et al., 2000a, p.48 Description The Vianí Fault is located on the western slope of the Eastern Ranges of the Colombian Andes. The fault places Lower Cretaceous rocks of the Villeta Group (Trincheras, Simijaca, Hiló and Capotes Formations), to the northwest against Upper Cretaceous rocks of the Güagüaquí Group to the southeast. In the southern area of the fault, the north–south oriented Vianí Fault thrusts the Seca Formation on top of the Hoyón Formation. Farther to the north at Vianí, the fault strike changes to northeast–southwest and the fault displaces the Bituima Fault.Plancha 227, 1998 The fault trace is characterised by offset spurs, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vianí
Vianí is a municipality and town of Colombia in the Departments of Colombia, department of Cundinamarca Department, Cundinamarca. External links Official website Municipalities of Cundinamarca Department {{Cundinamarca-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Simijaca Formation
The Simijaca Formation (, K2S, Kss) is a formation (geology), geological formation of the Altiplano Cundiboyacense, Cordillera Oriental (Colombia), Eastern Ranges of the Colombian Andes. The predominantly mudstone formation dates to the Late Cretaceous period; Turonian and Cenomanian epochs, and has a maximum thickness of . Etymology The formation was defined and named in 1991 by Ulloa and Rodríguez after Simijaca, Cundinamarca Department, Cundinamarca.Montoya & Reyes, 2005, p.21 Description Lithologies The Simijaca Formation is characterised by a sequence of mudstones, grey and black shales with sandstone and limestone intercalations. Stratigraphy and depositional environment The Simijaca Formation conformably overlies the Chiquinquirá Sandstone, and the Hiló Formation, Hiló and Pacho Formations, and is overlain by the La Frontera Formation.Acosta & Ulloa, 2001, p.32 The age has been estimated to be Turonian, or Cenomanian.Acosta & Ulloa, 2001, p.41 Stratigraphically, ... [...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 Santande ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Moment Magnitude Scale
The moment magnitude scale (MMS; denoted explicitly with or Mwg, and generally implied with use of a single M for magnitude) is a measure of an earthquake's magnitude ("size" or strength) based on its seismic moment. was defined in a 1979 paper by Thomas C. Hanks and Hiroo Kanamori. Similar to the local magnitude scale, local magnitude/Richter scale () defined by Charles Francis Richter in 1935, it uses a logarithmic scale; small earthquakes have approximately the same magnitudes on both scales. Despite the difference, news media often use the term "Richter scale" when referring to the moment magnitude scale. Moment magnitude () is considered the authoritative magnitude scale for ranking earthquakes by size. It is more directly related to the energy of an earthquake than other scales, and does not saturatethat is, it does not underestimate magnitudes as other scales do in certain conditions. It has become the standard scale used by seismological authorities like the United State ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bogotá Savanna
The Bogotá savanna is a savanna#Savanna ecoregions, montane savanna, located in the southwestern part of the Altiplano Cundiboyacense in the center of Colombia. The Bogotá savanna has an extent of and an average altitude of . The savanna is situated in the Cordillera Oriental (Colombia), Eastern Ranges of the Colombian Andes. The Bogotá savanna is crossed from northeast to southwest by the long Bogotá River, which at the southwestern edge of the plateau forms the Tequendama Falls (''Salto del Tequendama''). Other rivers, such as the Subachoque River, Subachoque, Bojacá River, Bojacá, Fucha River, Fucha, Soacha River, Soacha and Tunjuelo Rivers, tributaries of the Bogotá River, form smaller valleys with very fertile soils dedicated to agriculture and cattle-breeding. Before the Spanish conquest of the Muisca, Spanish conquest of the Bogotá savanna, the area was inhabited by the indigenous Muisca people, Muisca, who formed a loose confederation of various ''caciques'', na ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Guaduas
Guaduas () is a municipality and town in Colombia, in the Lower Magdalena Province department of Cundinamarca Department, Cundinamarca, about 117 km from Bogotá. It is an agricultural and tourist center of some importance with a population of about 33,000 in the municipality. Its name refers to a type of Guadua, bamboo cane. It is one of the cities on the Bogotá-Medellín highway. Its main plaza is featured on the Colombian ten-thousand Colombian peso, pesos bill, and is one of the seats of the Roman Catholic Diocese of La Dorada–Guaduas History The early inhabitants of the "Valley of the Guaduas" were the indigenous Panche people. It was an important stop on the road from Santafé de Bogotá to Honda, located in a small, fertile valley. The town proper was founded on April 20, 1572 by Andrés Díaz Venero de Leiva. It was abandoned after its foundation until December 13, 1610, when Fray Tomas de Morales founded the Franciscan monastery of ''La Soledad'' on the same ... [...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 create 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. 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 stress or transtension and transpression stress, if the shear motion is ob ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fault Scarp
A fault scarp is a small step-like offset of the ground surface in which one side of a fault has shifted vertically in relation to the other. The topographic expression of fault scarps results from the differential erosion of rocks of contrasting resistance and the displacement of land surface by movement along the fault. Differential movement and erosion may occur either along older inactive geologic faults, or recent active faults. Characteristics Fault scarps often involve zones of highly fractured rock and discontinuities of hard and weak consistencies of rock. Bluffs can form from upthrown blocks and can be very steep, as in the case of Pakistan's coastal cliffs. The height of the scarp formation tends to be defined in terms of the vertical displacement along the fault. Active scarp faults may reflect rapid tectonic displacement and can be caused by any type of fault including strike-slip faults. Vertical displacement of ten meters may occur in fault scarps in volcanic bed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bituima Fault
Bituima is a municipality and town of Colombia Colombia, officially the Republic of Colombia, is a country primarily located in South America with Insular region of Colombia, insular regions in North America. The Colombian mainland is bordered by the Caribbean Sea to the north, Venezuel ... in the department of Cundinamarca. Municipalities of Cundinamarca Department {{Cundinamarca-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Seca Formation, Colombia
SECA, SecA or Seca may refer to: * Société Européenne de Contrôle d'Accès, now Nagra France * The SECA Mediaguard encryption system, designed by the above company. * Society for the Encouragement of Contemporary Art, an auxiliary part of the San Francisco Museum of Modern Art ** The SECA Art Awards granted by this Society * Southern Early Childhood Association (SECA) * Solid State Energy Conversion Alliance (SECA) * Seča, a village in the Municipality of Piran, southwestern Slovenia * Seca GmbH & Co. KG., a German company * SecA protein - an ATPase in the bacterial translocase pathway * SecA or secondary average, baseball statistic * Sulphur Emission Control Area: areas of the North Sea and the California coast where low-sulphur heavy fuel oil must be used aboard ships, as defined in MARPOL Annex VI. * Self Employment Contributions Act, a payroll tax on self-employed workers in the United States similar to FICA. * The ICAO code for Ciudad de Catamayo Airport in Catamayo, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
