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Cancañiri Formation
The Cancañiri Formation, also named as Cancañiri Tillite, is a Katian to Hirnantian geologic Formation (geology), formation of central Bolivia. The pebbly, argillaceous sandstones, shales and siltstones of the up to thick formation,Díaz Martínez, 2005, p.237 were deposited in a glacial foreshore to deep water turbidite, turbiditic depositional environment, environment.Díaz Martínez, 1997, p.55 The formation is named after Cancañiri, a mining town close to Llallagua, where a local legend of a possessed woman is believed. The formation overlies the San Benito Formation, Bolivia, San Benito Formation in Cochabamba and the Amutara Formation in other parts. The Cancañiri Formation is overlain by the Uncía Formation.Díaz Martínez, 1997, p.56 Fossil content The formation has provided the following fossils: * ''Destombesium, Destombesium pacochicoensis'' * ''Dinorthis, Dinorthis flabellulum'' * ''Drabovinella, Drabovinella curiosa'' * ''Tunariorthis, Tunariorthis cardocanal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geological Formation
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 (geology), 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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Siltstone
Siltstone, also known as aleurolite, is a clastic sedimentary rock that is composed mostly of silt. It is a form of mudrock with a low clay mineral content, which can be distinguished from shale by its lack of fissility. Although its permeability and porosity is relatively low, siltstone is sometimes a tight gas reservoir rock, an unconventional reservoir for natural gas that requires hydraulic fracturing for economic gas production. Siltstone was prized in ancient Egypt for manufacturing statuary and cosmetic palettes. The siltstone quarried at Wadi Hammamat was a hard, fine-grained siltstone that resisted flaking and was almost ideal for such uses. Description There is not complete agreement on the definition of siltstone. One definition is that siltstone is mudrock (clastic sedimentary rock containing at least 50% clay and silt) in which at least 2/3 of the clay and silt fraction is composed of silt-sized particles. Silt is defined as grains 2–62 μm in diam ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Fossiliferous Stratigraphic Units In Bolivia
This is a list of fossiliferous stratigraphic units in Bolivia. __NOTOC__ List of fossiliferous stratigraphic units See also * * Gomphothere fossils in Bolivia * South American land mammal ages * List of fossiliferous stratigraphic units in Paraguay * List of fossiliferous stratigraphic units in Peru References Bibliography * * ;Cajones Formation * ;Casira Formation * ;Cerdas beds * ;Honda Group * * * * ;Lacayani fauna * ;Mesón Group * ;Los Monos Formation * ;Ñuapua Formation * ;La Puerta Formation * ;Puncoviscana Formation * ;Quehua Formation * ;Salla Formation * * * ;Santa Lucía Formation * * * * * * * * * ;Tarija Formation * ;Toro Toro Formation * * ;Umala Formation * ;Yecua & Petaca Formations * Further reading * ;Mesozoic * L. Branisa. 1968. Hallazgo del amonite Neolobites en la Caliza Miraflores y de huellas de dinosaurios en la formación El Molino y su significado para la determinación de la edad d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Llallagua
Llallagua (in hispanicized spelling) or Llallawa ( Aymara for a monstrous potato (like two potatoes) or animal, Quechua for the god of seed-time during the Inca period) is a town in the Potosí Department in Bolivia. It is the seat of the Llallagua Municipality, the third municipal section of the Rafael Bustillo Province. History Llallagua (in its common form) or Llallawa (as it is written in Quechua) is the name given by the indigenous people of the Andes. Geography Llallagua features a rare microclimate amidst the semi-arid tundras of Potosí and Oruro, due to its extreme elevation near 4000m. Semi-arid and with average temperatures in its warmest month sitting right on the 11 °C threshold, the city's climate straddles that of the subtropical highland climate (''Cwc'', according to the Köppen climate classification The Köppen climate classification divides Earth climates into five main climate groups, with each group being divided based on patterns of seas ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fossilworks
Fossilworks was a portal which provides query, download, and analysis tools to facilitate access to the Paleobiology Database, a large relational database assembled by hundreds of paleontologists from around the world. History Fossilworks was created in 1998 by John Alroy and housed at Macquarie University Macquarie University ( ) is a Public university, public research university in Sydney, New South Wales, Australia. Founded in 1964 by the New South Wales Government, it was the third university to be established in the Sydney metropolitan area. .... It included many analysis and data visualization tools formerly included in the Paleobiology Database.{{cite web, title=Frequently asked questions, url=http://www.fossilworks.org/cgi-bin/bridge.pl?page=FAQ, publisher=Fossilworks, access-date=17 December 2021, archive-date=18 May 2022, archive-url=https://web.archive.org/web/20220518205516/http://www.fossilworks.org/cgi-bin/bridge.pl?page=FAQ, url-status=dead Fossilworks was sh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
