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Tremp Formation
The Tremp Formation ( es, Formación de Tremp, ca, Formació de Tremp), alternatively described as Tremp Group ( es, Grupo Tremp), is a geological formation in the comarca Pallars Jussà, Lleida, Spain. The formation is restricted to the Tremp or Tremp-Graus Basin ( ca, Conca de Tremp), a piggyback foreland basin in the Catalonian Pre-Pyrenees. The formation dates to the Maastrichtian to Thanetian,Pujalte & Schmitz, 2005, p.82 thus the formation includes the Cretaceous-Paleogene boundary that has been well studied in the area, using paleomagnetism and carbon and oxygen isotopes. The formation comprises several lithologies, from sandstone, conglomerates and shales to marls, siltstones, limestones and lignite and gypsum beds and ranges between in thickness. The Tremp Formation was deposited in a continental to marginally marine fluvial-lacustrine environment characterized by estuarine to deltaic settings. The Tremp Basin evolved into a sedimentary depression with the break-up ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tremp Formation
The Tremp Formation ( es, Formación de Tremp, ca, Formació de Tremp), alternatively described as Tremp Group ( es, Grupo Tremp), is a geological formation in the comarca Pallars Jussà, Lleida, Spain. The formation is restricted to the Tremp or Tremp-Graus Basin ( ca, Conca de Tremp), a piggyback foreland basin in the Catalonian Pre-Pyrenees. The formation dates to the Maastrichtian to Thanetian,Pujalte & Schmitz, 2005, p.82 thus the formation includes the Cretaceous-Paleogene boundary that has been well studied in the area, using paleomagnetism and carbon and oxygen isotopes. The formation comprises several lithologies, from sandstone, conglomerates and shales to marls, siltstones, limestones and lignite and gypsum beds and ranges between in thickness. The Tremp Formation was deposited in a continental to marginally marine fluvial-lacustrine environment characterized by estuarine to deltaic settings. The Tremp Basin evolved into a sedimentary depression with the break-up ... [...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 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 Wer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alveolina Limestone
''Alveolina'' is an extinct genus of foraminifera Foraminifera (; Latin for "hole bearers"; informally called "forams") are single-celled organisms, members of a phylum or class of amoeboid protists characterized by streaming granular Ectoplasm (cell biology), ectoplasm for catching food and ot ... with an elliptical or spherical form. References Further reading * * {{Taxonbar, from=Q3613439 Tubothalamea Prehistoric Foraminifera genera ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Foreland Basin
A foreland basin is a structural basin that develops adjacent and parallel to a mountain belt. Foreland basins form because the immense mass created by crustal thickening associated with the evolution of a mountain belt causes the lithosphere to bend, by a process known as lithospheric flexure. The width and depth of the foreland basin is determined by the flexural rigidity of the underlying lithosphere, and the characteristics of the mountain belt. The foreland basin receives sediment that is eroded off the adjacent mountain belt, filling with thick sedimentary successions that thin away from the mountain belt. Foreland basins represent an endmember basin type, the other being rift basins. Space for sediments (accommodation space) is provided by loading and downflexure to form foreland basins, in contrast to rift basins, where accommodation space is generated by lithospheric extension. Types of foreland basin Foreland basins can be divided into two categories: * Periph ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Piggyback Basin
A piggyback basin (also piggy-back, thrust-sheet-top, detached, or satellite basin) is a minor sedimentary basin developed on top of a moving thrust sheet as part of a foreland basin system. Piggyback basins form in the wedge-top depositional zone of a foreland basin system as new thrusts in the foreland cut up through the existing footwall containing the eroded wedge-top basins in the old thrust sheet. The basin is separated from the foredeep by an anticline or syndepositional growth structures. The piggyback basin is named after its tendency to be carried passively toward the hinterland with the old thrust sheet in response to the compressive forces of the new thrust sheet. Sedimentary fill for the basin come from the hanging wall ramp of the older thrust sheet, from the foreland orogeny or from the sides of the basin. Drainage into the basin may come from highs associated with the thrust sheets or the basin may be filled from longitudinal flows across the basin. The Po Basin of I ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spain
, image_flag = Bandera de España.svg , image_coat = Escudo de España (mazonado).svg , national_motto = ''Plus ultra'' (Latin)(English: "Further Beyond") , national_anthem = (English: "Royal March") , image_map = , map_caption = , image_map2 = , capital = Madrid , coordinates = , largest_city = Madrid , languages_type = Official language , languages = Spanish language, Spanish , ethnic_groups = , ethnic_groups_year = , ethnic_groups_ref = , religion = , religion_ref = , religion_year = 2020 , demonym = , government_type = Unitary state, Unitary Parliamentary system, parliamentary constitutional monarchy , leader_title1 = Monarchy of Spain, Monarch , leader_name1 = Felipe VI , leader_title2 = Prime Minister of Spain ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lleida Province
The Province of Lleida (; Aranese Occitan: Lhèida ; es, Lérida ) is one of the four provinces of Catalonia. It lies in north-eastern Spain, in the western part of the autonomous community of Catalonia, and is bordered by the Provinces of Girona, Barcelona, Tarragona, Zaragoza and Huesca and the countries of France and Andorra. It is often popularly referred to as Ponent (i.e. the West). Of the population of 414,015 (2007), about 30% live in the capital, Lleida. Some other towns in the Province of Lleida are La Seu d'Urgell (see the archbishop, who is also the co-prince to Andorra), Mollerussa, Cervera, Tàrrega, and Balaguer. There are 231 municipalities in Lleida. (See ''List of municipalities in Lleida.'') Located in the Pyrenees, the Aran Valley is a special comarca with greater autonomy and with Aranese, a variety of Occitan, as its official language. The Aigüestortes i Estany de Sant Maurici National Park is located in this province. The province enjoys a thrivin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pallars Jussà
Pallars Jussà () is a comarca (county) in Catalonia, Spain. It was established as a ''comarca'' in 1936, out of the old county of Pallars. The name means "Lower Pallars"; to the northeast and into the mountains is Pallars Sobirà. Its capital and largest municipality is Tremp. Municipalities See also *County of Pallars Jussà The County of Pallars Jussà or Lower Pallars was a county in the Hispanic March during the eleventh and twelfth centuries, long after the march had ceased to be effectively administered by the Kings of France. It was a division of the County of ... * Cabdella Lakes References External links Official comarcal web site (in Catalan) [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Comarca
A ''comarca'' (, or , or ) is a traditional region or local administrative division found in Portugal, Spain and some of their former colonies, like Brazil, Nicaragua, and Panama. The term is derived from the term ''marca'', meaning a "march, mark", plus the prefix ''co''-, meaning "together, jointly". The ''comarca'' is known in Aragonese as ''redolada'' () and in Basque as ''eskualde'' (). In addition, in Galician, ''comarcas'' are also called ''bisbarras'' (). Although the English word "county" and its near synonym "shire" have similar meanings, they are usually translated into Spanish and Portuguese as ''condado'', a term which in the Iberian peninsula only refers to regions historically ruled by a ''conde'' (count or earl). However, "comarca" is occasionally used, with examples including the Spanish Wikipedia entry for "comarca" and some translations of The Lord of the Rings (see below). In the CPLP In the Community of Portuguese Language Countries (CPLP), ''coma ... [...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 Wer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tremp Formation - Units In The Tremp-Graus Basin
Tremp () is a municipality in Catalonia, Spain, the capital of the ''comarca'' of the Pallars Jussà. It is the largest municipality in Catalonia in terms of area (),The municipality of Tortosa is historically larger than Tremp, but was subdivided into five separate municipalities between 1977 and 1983. accounting for nearly a quarter of the total area of the ''comarca''. The municipality is a geographical oddity and consists of five separate territorial entities within the ''comarca'' (district) of Pallars Jussa (see image). The town of Tremp (population 6228 as of 2009) is the second smallest of these and is situated in the valley of the Noguera Pallaresa river below Talarn and the Talarn Dam. The largest portion of the municipal territory lies to the west of the valley of the Noguera Pallaresa and stretches as far as the Noguera Ribagorçana river. A third portion is an exclave of the ''comarca'' within the municipality of el Pont de Suert in the Alta Ribagorça. In the east t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paleogeography Of Europe In The Maastrichtian
Palaeogeography (or paleogeography) is the study of historical geography, generally physical landscapes. Palaeogeography can also include the study of human or cultural environments. When the focus is specifically on landforms, the term paleogeomorphology is sometimes used instead. Paleomagnetism, paleobiogeography, and tectonic history are among its main tools. Palaeogeography yields information that is crucial to scientific understanding in a variety of contexts. For example, palaeogeographical analysis of sedimentary basins plays a key role in the field of petroleum geology, because ancient geomorphological environments of the Earth's surface are preserved in the stratigraphic record. Palaeogeographers also study the sedimentary environment associated with fossils for clues to the evolutionary development of extinct species. Palaeogeography is furthermore crucial to the understanding of palaeoclimatology, due to the impact of the positions of continents and oceans on influe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
