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Las Pavas
The Las Pavas, also called La Pava (Spanish: ''Mina La(s) Pava(s)''),Giuliani et al., 1995, p.154 is a Colombian emerald mining area that is neighboring Colombia's largest emerald mine, Puerto Arturo. It is located northwest of the capital Bogotá in the western emerald belt of Muzo, and about west of Chivor, which is in the eastern emerald belt. The mining area spans the municipalities Quípama and Muzo. History Colombia holds the world's largest resources of Class 1 emeralds, following that are Zambia's and Brazil's Class 3 emeralds. The Muzo emerald deposits are situated in the western foothills of the Eastern Ranges of the Colombian Andes. They lie about by trail west of the village of Muzo in the Department of Boyacá, and embrace about eight great open cuts, closely grouped, occupying a portion of a steep walled valley, that of the Itoco, also called ''Quebrada del Desaguadero'', an affluent of the Minero River which empties into the northward-flowing Magdalena, the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quípama
Quípama is a town and municipality in the Colombian Department of Boyacá, part of the subregion of the Western Boyacá Province. It is home of one of the largest emerald mines in the world. Climate Quípama has a tropical rainforest climate (Af) with heavy to very heavy rainfall year-round. See also * Las Pavas * Muzo, Chivor, Somondoco Somondoco is a town and municipality in the Colombian Department of Boyacá. This town and larger municipal area are located in the Valle de Tenza. The Valle de Tenza is the ancient route connecting the Altiplano Cundiboyacense and the Llanos. ... References External links Municipalities of Boyacá Department {{Boyacá-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Somondoco
Somondoco is a town and municipality in the Colombian Department of Boyacá. This town and larger municipal area are located in the Valle de Tenza. The Valle de Tenza is the ancient route connecting the Altiplano Cundiboyacense and the Llanos. The area is dotted with many such little towns all located at approximately the same altitude (1500–1700 meters). Somondoco borders Almeida in the east, Guayatá in the west, Guateque and Sutatenza in the north and in the south the Cundinamarca municipality of Ubalá. The nearest larger town is Guateque which is about 30 minutes away by car. In Somondoco are several small companies producing handicrafts and collectables. Etymology Somondoco is derived from the Chibcha words ''So'' = stone, ''Mon'' = bath, ''Co'' = support. The village is named after ''cacique Somendoco'' or ''Sumindoco''. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rosablanca Formation
The Rosablanca Formation (, Kir) is a geological formation of the Altiplano Cundiboyacense, Eastern Ranges of the Colombian Andes and the Middle Magdalena Basin. The formation consists of grey limestones, dolomites and shales with at the upper part sandstones. The formation dates to the Early Cretaceous period; Valanginian epoch and has a thickness of in the valley of the Sogamoso River. Definition The formation was first defined by Wheeler in 1929. Description Lithologies The Rosablanca Formation is characterised by a sequence of grey limestones, dolomites and shales with a maximum thickness of in the Sogamoso River valley.Galvis & Valencia, 2009, p.17 Stratigraphy and depositional environment The Rosablanca Formation overlies the Arcabuco Formation and is overlain by the Ritoque Formation. The age has been estimated to be Valanginian. Stratigraphically, the formation is time equivalent with the Macanal Formation. Fossils Fossils of the decapod crustacean '' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Muzo Formation
Muzo () is a town and Municipalities of Colombia, municipality in the Western Boyacá Province, part of the departments of Colombia, department of Boyacá Department, Boyacá, Colombia. It is widely known as the world capital of Colombian emeralds, emeralds for the mines containing the world's highest quality gems of emerald, this type. Muzo is situated at a distance of from the departmental capital Tunja and from the capital of the Western Boyacá Province, Chiquinquirá. The urban centre is at an altitude of above sea level. Muzo borders Otanche and San Pablo de Borbur in the north, Maripí and Coper, Boyacá, Coper in the east, Quípama in the west and the department of Cundinamarca Department, Cundinamarca in the south. Etymology The town of Muzo was called Villa de la Santísima Trinidad de los Muzos, or simply Trinidad, when the Spanish Empire, Spanish list of conquistadors in Colombia, conquistadors first founded the settlement in western Boyacá. Muzo is the Exonym an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Evaporite
An evaporite () is a water- soluble sedimentary mineral deposit that results from concentration and crystallization by evaporation from an aqueous solution. There are two types of evaporite deposits: marine, which can also be described as ocean deposits, and non-marine, which are found in standing bodies of water such as lakes. Evaporites are considered sedimentary rocks and are formed by chemical sediments. Formation Although all water bodies on the surface and in aquifers contain dissolved salts, the water must evaporate into the atmosphere for the minerals to precipitate. For this to happen, the water body must enter a restricted environment where water input into this environment remains below the net rate of evaporation. This is usually an arid environment with a small drainage basin fed by a limited input of water. When evaporation occurs, the remaining water is enriched in salts, and they precipitate after the water becomes saturated. Depositional environments ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Black Shale
Shale is a fine-grained, clastic sedimentary rock formed from mud that is a mix of flakes of clay minerals (hydrous aluminium phyllosilicates, e.g., kaolin, Al2 Si2 O5( OH)4) and tiny fragments (silt-sized particles) of other minerals, especially quartz and calcite.Blatt, Harvey and Robert J. Tracy (1996) ''Petrology: Igneous, Sedimentary and Metamorphic'', 2nd ed., Freeman, pp. 281–292 Shale is characterized by its tendency to split into thin layers ( laminae) less than one centimeter in thickness. This property is called '' fissility''. Shale is the most common sedimentary rock. The term ''shale'' is sometimes applied more broadly, as essentially a synonym for mudrock, rather than in the narrower sense of clay-rich fissile mudrock. Texture Shale typically exhibits varying degrees of fissility. Because of the parallel orientation of clay mineral flakes in shale, it breaks into thin layers, often splintery and usually parallel to the otherwise indistinguishable bedding plan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Limestone
Limestone is a type of carbonate rock, carbonate sedimentary rock which is the main source of the material Lime (material), lime. It is composed mostly of the minerals calcite and aragonite, which are different Polymorphism (materials science), crystal forms of calcium carbonate . Limestone forms when these minerals Precipitation (chemistry), precipitate out of water containing dissolved calcium. This can take place through both biological and nonbiological processes, though biological processes, such as the accumulation of corals and shells in the sea, have likely been more important for the last 540 million years. Limestone often contains fossils which provide scientists with information on ancient environments and on the evolution of life. About 20% to 25% of sedimentary rock is carbonate rock, and most of this is limestone. The remaining carbonate rock is mostly Dolomite (rock), dolomite, a closely related rock, which contains a high percentage of the mineral Dolomite (mine ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sandstone
Sandstone is a Clastic rock#Sedimentary clastic rocks, clastic sedimentary rock composed mainly of grain size, sand-sized (0.0625 to 2 mm) silicate mineral, silicate grains, Cementation (geology), cemented together by another mineral. Sandstones comprise about 20–25% of all sedimentary rocks. Most sandstone is composed of quartz or feldspar, because they are the most resistant minerals to the weathering processes at the Earth's surface. Like uncemented sand, sandstone may be imparted any color by impurities within the minerals, but the most common colors are tan, brown, yellow, red, grey, pink, white, and black. Because sandstone beds can form highly visible cliffs and other topography, topographic features, certain colors of sandstone have become strongly identified with certain regions, such as the red rock deserts of Arches National Park and other areas of the Southwestern United States, American Southwest. Rock formations composed of sandstone usually allow the p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Formation (geology)
A geological formation, or simply formation, is a body of rock having a consistent set of physical characteristics ( lithology) that distinguishes it from adjacent bodies of rock, and which occupies a particular position in the layers of rock exposed in a geographical region (the stratigraphic column). It is the fundamental unit of lithostratigraphy, the study of strata or rock layers. A formation must be large enough that it can be mapped at the surface or traced in the subsurface. Formations are otherwise not defined by the thickness of their rock strata, which can vary widely. They are usually, but not universally, tabular in form. They may consist of a single lithology (rock type), or of alternating beds of two or more lithologies, or even a heterogeneous mixture of lithologies, so long as this distinguishes them from adjacent bodies of rock. The concept of a geologic formation goes back to the beginnings of modern scientific geology. The term was used by Abraham Gottlob ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Miocene
The Miocene ( ) is the first epoch (geology), geological epoch of the Neogene Period and extends from about (Ma). The Miocene was named by Scottish geologist Charles Lyell; the name comes from the Greek words (', "less") and (', "new") and means "less recent" because it has 18% fewer modern marine invertebrates than the Pliocene has. The Miocene followed the Oligocene and preceded the Pliocene. As Earth went from the Oligocene through the Miocene and into the Pliocene, the climate slowly cooled towards a series of ice ages. The Miocene boundaries are not marked by distinct global events but by regionally defined transitions from the warmer Oligocene to the cooler Pliocene Epoch. During the Early Miocene, Afro-Arabia collided with Eurasia, severing the connection between the Mediterranean and Indian Oceans, and allowing the interchange of fauna between Eurasia and Africa, including the dispersal of proboscideans and Ape, hominoids into Eurasia. During the late Miocene, the conn ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fold And Thrust Belt
A fold and thrust belt is a series of mountainous foothills adjacent to an orogenic belt, which forms due to contractional tectonics. Fold and thrust belts commonly form in the forelands adjacent to major orogens as deformation propagates outwards. Fold and thrust belts usually comprise both folds and thrust fault A thrust fault is a break in the Earth's crust, across which older rocks are pushed above younger rocks. Thrust geometry and nomenclature Reverse faults A thrust fault is a type of reverse fault that has a dip of 45 degrees or less. I ...s, commonly interrelated. They are commonly also known as thrust-and-fold belts, or simply thrust-fold belts. Geometry Fold and thrust belts are formed of a series of sub-parallel thrust sheets, separated by major thrust faults. As the total shortening increases in a fold and thrust belt, the belt propagates into its foreland. New thrusts develop at the front of the belt, folding the older thrusts that have become inactiv ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
