|
Sierra Madrona
Sierra Madrona is a mountain range of the Sierra Morena, Spain. It is located in Ciudad Real Province, in the region of Castile-La Mancha as well as the Córdoba Province (Spain), Córdoba and Province of Jaén (Spain), Jaén provincial limits, Andalusia. Its highest peak, 1,332 m high Bañuela, is the highest point of the whole Sierra Morena system. Other notable summits are Dormideros 1,328 m, ''Corral de Borros'' 1,312 m, Abulagoso 1,301 m and ''Rebollera'' 1,161 m. Description Sierra Madrona is a massif composed of a series of subranges including ''Sierra de Quintana'', ''Sierra de Hornilleros'', ''Sierra de Navalmanzano'', ''Sierra de la Garganta'' and ''Sierra del Nacedero''. They are aligned in a NW-SE direction and are separated by narrow valleys. The range is bounded by the Robledillo river valley and ''Sierra de la Solana'' and ''Umbria de Alcudia'' in the North, the Montoro river valley in the East, by the smooth hills of Sierra de Andújar, Sierra Quiteria and Los Pe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Los Pedroches
Los Pedroches is a natural region and comarca in Córdoba Province, Andalusia, southern Spain. It is located in the Sierra Morena area at the northern end of the province. The main town is Pozoblanco. The climate of the comarca is continental. It is the northernmost Andalusian territory. The name of the present-day official comarca is ''Los Pedroches''. The of quite coincided with Los Pedroches. Municipalities * Alcaracejos * Añora * Belalcázar * Cardeña ** Venta del Charco ** Azuel * Conquista * Dos Torres * El Guijo * El Viso * Fuente la Lancha * Hinojosa del Duque * Pedroche * Pozoblanco * Santa Eufemia * Torrecampo * Villanueva del Duque * Villaralto * Villanueva de Córdoba Specialty: ham Aḥmad al-Rāzī (Córdoba, 888 - Córdoba, 955) calls the Pedroches "Fahs al Ballut", which means "plain of acorns". He says: "The oak is the only tree species in this area. That’s why it is called "The plain of acorns", and they are the best in Spain." The "Los Pedroches ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Syncline
In structural geology, a syncline is a fold with younger layers closer to the center of the structure, whereas an anticline is the inverse of a syncline. A synclinorium (plural synclinoriums or synclinoria) is a large syncline with superimposed smaller folds. Synclines are typically a downward fold (synform), termed a synformal syncline (i.e. a trough), but synclines that point upwards can be found when strata have been overturned and folded (an antiformal syncline). Characteristics On a geologic map, synclines are recognized as a sequence of rock layers, with the youngest at the fold's center or ''hinge'' and with a reverse sequence of the same rock layers on the opposite side of the hinge. If the fold pattern is circular or elongate, the structure is a basin. Folds typically form during crustal deformation as the result of compression that accompanies orogenic mountain building. Notable examples * Powder River Basin, Wyoming, US * Sideling Hill roadcut along Inters ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anticline
In structural geology, an anticline is a type of Fold (geology), fold that is an arch-like shape and has its oldest Bed (geology), beds at its core, whereas a syncline is the inverse of an anticline. A typical anticline is convex curve, convex up in which the hinge or crest is the location where the curvature is greatest, and the limbs are the sides of the fold that Strike and dip, dip away from the hinge. Anticlines can be recognized and differentiated from antiforms by a sequence of rock layers that become progressively older toward the center of the fold. Therefore, if age relationships between various Stratum, rock strata are unknown, the term antiform should be used. The progressing age of the rock strata towards the core and uplifted center, are the trademark indications for evidence of anticlines on a geological map. These formations occur because anticlinal ridges typically develop above thrust faults during crustal deformations. The uplifted core of the fold cau ... [...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] |
Greywacke
Greywacke or graywacke ( ) is a variety of sandstone generally characterized by its hardness (6–7 on Mohs scale), dark color, and Sorting (sediment), poorly sorted angular grains of quartz, feldspar, and small rock fragments or sand-size Lithic fragment (geology), lithic fragments set in a compact, clay-fine matrix. It is a texturally immature sedimentary rock generally found in Paleozoic Stratum, strata. The larger Particle size (grain size), grains can be sand- to gravel-sized, and Matrix (geology), matrix materials generally constitute more than 15% of the rock by volume. Formation The origin of greywacke was unknown until turbidity currents and turbidites were understood, since, according to the normal laws of sedimentation, gravel, sand and mud should not be laid down together. Geologists now attribute its formation to submarine avalanches or strong turbidity currents. These actions churn sediment and cause mixed-sediment slurries, in which the resulting deposits may ex ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Schist
Schist ( ) is a medium-grained metamorphic rock generally derived from fine-grained sedimentary rock, like shale. It shows pronounced ''schistosity'' (named for the rock). This means that the rock is composed of mineral grains easily seen with a low-power hand lens, oriented in such a way that the rock is easily split into thin flakes or plates. This texture (geology), texture reflects a high content of platy minerals, such as mica, talc, chlorite group, chlorite, or graphite. These are often interleaved with more granular minerals, such as feldspar or quartz. Schist typically forms during regional metamorphism accompanying the process of mountain building (orogeny) and usually reflects a medium Metamorphism#Metamorphic grades, grade of metamorphism. Schist can form from many different kinds of rocks, including sedimentary rocks such as mudstones and igneous rocks such as tuffs. Schist metamorphosed from mudstone is particularly common and is often very rich in mica (a ''mica schis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geologically
Geology (). is a branch of natural science concerned with the Earth and other astronomical objects, the rocks of which they are composed, and the processes by which they change over time. Modern geology significantly overlaps all other Earth sciences, including hydrology. It is integrated with Earth system science and planetary science. Geology describes the structure of the Earth on and beneath its surface and the processes that have shaped that structure. Geologists study the mineralogical composition of rocks in order to get insight into their history of formation. Geology determines the relative ages of rocks found at a given location; geochemistry (a branch of geology) determines their absolute ages. By combining various petrological, crystallographic, and paleontological tools, geologists are able to chronicle the geological history of the Earth as a whole. One aspect is to demonstrate the age of the Earth. Geology provides evidence for plate tectonics, the evoluti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cave Paintings
In archaeology, cave paintings are a type of parietal art (which category also includes petroglyphs, or engravings), found on the wall or ceilings of caves. The term usually implies prehistoric origin. These paintings were often created by ''Homo sapiens'', but also Denisovans and Neanderthals; other species in the same ''Homo'' genus. Discussion around prehistoric art is important in understanding the history of ''Homo sapiens'' and how human beings have come to have unique abstract thoughts. Some point to these prehistoric paintings as possible examples of creativity, spirituality, and sentimental thinking in prehistoric humans. The oldest known are more than 40,000 years old (art of the Upper Paleolithic) and found in the caves in the district of Maros (Sulawesi, Indonesia). The oldest are often constructed from hand stencils and simple geometric shapes.M. Aubert et al., "Pleistocene cave art from Sulawesi, Indonesia", ''Nature'' vol. 514, pp. 223–227 (9 October 2014). "us ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Puertollano
Puertollano () is a municipalities of Spain, municipality of Spain located in the province of Ciudad Real, Castile-La Mancha. The city has a population of 45,539 (2022). Contrasting to the largely rural character of the region, Puertollano stands out for the importance of Industrial sector, industry, with a past linked to industrial and mining activities. It lies on the Madrid–Seville high-speed rail line (opened 1992). Geography Location Puertollano is located in the Iberian Peninsula, in the transitional region between the southern half of the Meseta Central, Inner Plateau and the northern reaches of Sierra Morena. It lies at the natural pass linking the plains of Argamasilla de Calatrava, Argamasilla to the North and the valley of the river to the south, on which a modest East–West chain of mountains interrupts, at about 710 metres above sea level. The Ojailén, a tributary of the (in turn a right-bank tributary of the Guadalquivir), originally belonged to the Guadi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Andújar
Andújar () is a Spanish municipality of 35,619 people (2024) in the province of Jaén, in Andalusia. The municipality is divided by the Guadalquivir River. The northern part of the municipality is where the Natural Park of the Sierra de Andújar is situated. To the south are agricultural fields and countryside. The city proper located on the right bank of the Guadalquivir and the Madrid- Córdoba railway. In the past, Andújar was widely known for its porous earthenware jars, called '' alcarrazas'' or '' botijos'', which keep water cool in the hottest weather, and were manufactured from a whitish clay found in the neighbourhood. History Antiquity Paleolithic artifacts have been found in the area, associated with the Acheulean Culture, but it is during the Neolithic Age when the area became increasingly populated, with agriculture being developed in the fertile land, and mining activities beginning in the Sierra Morena. According to archaeological studies, the firs ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
