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Hogback (geology)
In geology and geomorphology, a hogback or hog's back is a long, narrow ridge or a series of hills with a narrow crest and steep slopes of nearly equal inclination on both flanks. Typically, the term is restricted to a ridge created by the differential erosion of outcropping, steeply dipping (greater than 30–40°), Homocline, homoclinal, and typically sedimentary strata. One side of a hogback (its backslope) consists of the surface (bedding plane) of a steeply dipping rock stratum called a dip slope. The other side (its escarpment, frontslope or "scarp slope") is an erosion face that cuts through the Strike and dip, dipping strata that comprises the hogback.Huggett, JR (2011) ''Fundamentals of Geomorphology,'' 3rd ed., Routledge, New York. 516 pp. Cotton, CA (1952) ''Geomorphology An Introduction to the Study of Landforms, 6th ed.'' John Wiley and Sons, New York. 505 pp.Fairbridge, RW (1968) ''Hogback and Flatiron.'' In RW Fairbridge, ed., pp. 524-525, ''The Encyclopedia of Geomor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hogback NM
Hogback may refer to: *Grand Hogback, geological formation in Northwestern Colorado *Hogback (sculpture), Anglo-Scandinavian stone tomb markers found in the British Isles *Hogback (geology), one of a number of topographic features (landforms) created by the erosion of tilted strata *Hogback Hills, a recreation area straddling Genesee County and Lapeer County, Michigan * Hogback Mountain (other), the name of many mountains in the United States and Canada * Hogback (New York), a summit in Schoharie County, New York * Hogback Ridge, a summit in Alaska * Hogback Ridge, an early name for Mount Oread, Kansas * Doctor Hogback, a character in the anime and manga ''One Piece'', who lives on Thriller Bark See also *Hogs Back (other), including uses of ''Hogsback'' {{Disambiguation ... [...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] |
Harz Foreland
The Harz (), also called the Harz Mountains, is a highland area in northern Germany. It has the highest elevations for that region, and its rugged terrain extends across parts of Lower Saxony, Saxony-Anhalt, and Thuringia. The name ''Harz'' derives from the Middle High German word ''Hardt'' or ''Hart'' (hill forest). The name ''Hercynia'' derives from a Celtic name and could refer to other mountain forests, but has also been applied to the geology of the Harz. The Brocken is the highest summit in the Harz with an elevation of above sea level. The Wurmberg () is the highest peak located entirely within the state of Lower Saxony. Geography Location and extent The Harz has a length of , stretching from the town of Seesen in the northwest to Eisleben in the east, and a width of . It occupies an area of , and is divided into the Upper Harz (''Oberharz'') in the northwest, which is up to 800 m high, apart from the 1,100 m high Brocken massif, and the Lower Harz (''Unterharz'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Teufelsmauer (Harz)
The Teufelsmauer (German for "Devil's Wall") is a famous natural rock formation located in the Harz Mountains of central Germany. It stretches across the state of Saxony-Anhalt and is known for its striking, jagged sandstone cliffs and unique geological structure. Formed over millions of years, the Teufelsmauer was shaped by erosion and tectonic activity. The rock wall is part of the Northern Harz Boundary Fault and is considered one of the oldest rock formations in the region. The Teufelsmauer is surrounded by legends. One popular myth says the devil tried to claim land from God and built the wall overnight, but failed to complete it before sunrise—hence the name "Devil’s Wall." Today, it is a 'protected natural monumen1'' and a popular hiking and sightseeing destination, attracting nature lovers, photographers, and tourists alike The Teufelsmauer (''Devil's Wall'') is a rock formation made of hard sandstones of the Upper Cretaceous in the northern part of the Harz Forel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Belgium
Belgium, officially the Kingdom of Belgium, is a country in Northwestern Europe. Situated in a coastal lowland region known as the Low Countries, it is bordered by the Netherlands to the north, Germany to the east, Luxembourg to the southeast, France to the south, and the North Sea to the west. Belgium covers an area of and has a population of more than 11.8 million; its population density of ranks List of countries and dependencies by population density, 22nd in the world and Area and population of European countries, sixth in Europe. The capital and Metropolitan areas in Belgium, largest metropolitan region is City of Brussels, Brussels; other major cities are Antwerp, Ghent, Charleroi, Liège, Bruges, Namur, and Leuven. Belgium is a parliamentary system, parliamentary constitutional monarchy with a complex Federation, federal system structured on regional and linguistic grounds. The country is divided into three highly autonomous Communities, regions and language areas o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
North Eifel
The North Eifel ({{langx, de, Nordeifel), the northern part of the Eifel, a low mountain range in Germany and East Belgium, comprises the following six sub-regions: * Venn Foreland, * Hohes Venn, * Rur Eifel, * Limestone Eifel, * Our Valley and * High Eifel. All elements belong to the Hohes Venn – Eifel Nature Park. The raised bog of the Hohes Venn is particularly noteworthy. It was designated as a world heritage site by UNESCO. The Eifel Lake Plateau with the second largest dam in Germany, the Rur Valley Dam, lies in the centre of the North Eifel. Also within the North Eifel are: *Eifel National Park, *Monschau Hedegerow Country (''Monschauer Heckenland''), *Kermeter, *Hürtgen Forest and *Zitter Forest The Zitter Forest () is located in the Eifel region in the German district of Euskirchen (North Rhine-Westphalia) and in the Belgian province of Liège (Wallonia). Its highest point is . The Zitter Forest lies in the North Eifel between Hellenth .... External links Hohes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Richelsley
The Richelsley, also written Richel Ley, is an 80-metre-long and up to 12-metre-high rock formation on the edge of the High Fens, part of the Eifel Mountains, in Belgium. It bears a large cross and is a well-known pilgrimage site. ''Ley'' is a German word for "crag" or "rock". Name The name is supposed to have been given to it in the 12th century by Richwin, the founder of Richwinstein Castle, today Reichenstein Abbey. Geography Location The Richelsley is located in Belgium's Wallonia region, in the Liège Province multi-language municipality of Waimes, close to the German border near Reichenstein/Monschau Abbey. Geology The rock formation is a Devonian conglomerate, formed over 400 million years ago. It is incorrectly described in various documents as a megalith. It is however made of sedimentary rock that contains quartz, whose present shape and extent are a result of the natural erosion of the surrounding sediment. History The cross was erected in 1890 by the pri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Monocline
A monocline (or, rarely, a monoform) is a step-like fold in rock strata consisting of a zone of steeper dip within an otherwise horizontal or gently dipping sequence. Formation Monoclines may be formed in several different ways (see diagram) * By differential compaction over an underlying structure, particularly a large fault at the edge of a basin due to the greater compactibility of the basin fill, the amplitude of the fold will die out gradually upwards. * By mild reactivation of an earlier extensional fault during a phase of inversion causing folding in the overlying sequence. * As a form of fault propagation fold during upward propagation of an extensional fault in basement into an overlying cover sequence. * As a form of fault propagation fold during upward propagation of a reverse fault in basement into an overlying cover sequence. Examples * Waterpocket Fold in Capitol Reef National Park, Utah * Comb Ridge in southern Utah * Grandview-Phantom Monocline in Gra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Homoclinal Ridge
A homoclinal ridge or strike ridge is a hill or ridge with a moderate, generally between 10° and 30°, sloping backslope. Its backslope is a '' dip slope,'' that conforms with the dip of a resistant stratum or strata, called '' caprock.'' On the other side of the other slope, which is its frontslope, of a homoclinal ridge is a steeper or even cliff-like frontslope ( escarpment) that is formed by the outcrop of the caprock. The escarpment cuts through the dipping strata that comprises the homoclinal ridge. Cotton, C.A. (1952) ''Geomorphology An Introduction to the Study of Landforms.'' John Wiley and Sons, New York. 505 pp.Simonett, SD (1968) ''Cuesta.'' In RW Fairbridge, ed., pp. 233, ''The Encyclopedia of Geomorphology'' (Encyclopedia of Earth Sciences, Volume III), Reinhold, New York, 1296 pp. Huggett, JR (2011) ''Fundamentals of Geomorphology,'' 3rd ed., Routledge, New York. 516 pp. Twidale, C.R. and E.M. Campbell (1993) ''Australian Landforms: Structure, Process and Time.'' G ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cuesta
A cuesta () is a hill or ridge with a gentle slope on one side, and a steep slope on the other. In geology, the term is more specifically applied to a ridge where a harder sedimentary rock overlies a softer layer, the whole being tilted somewhat from the horizontal. This results in a long and gentle backslope called a dip slope that conforms with the dip of resistant strata, called caprock. Where erosion has exposed the frontslope of this, a steep slope or escarpment occurs. The resulting terrain may be called scarpland. Definition In general usage, a cuesta is a hill or ridge with a gentle slope (backslope) on one side, and a steep slope (frontslope) on the other. The word is from Spanish: "flank or slope of a hill; hill, mount, sloping ground". In geology and geomorphology, cuesta refers specifically to an asymmetric ridge with a long and gentle backslope called a dip slope that conforms with the dip of a resistant stratum or strata, called caprock. The outcrop of the c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bed (geology)
In geology, a bed is a layer of sediment, sedimentary rock, or volcanic rock "bounded above and below by more or less well-defined bedding surfaces".Neuendorf, K.K.E., J.P. Mehl, Jr., and J.A. Jackson, eds., 2005. ''Glossary of Geology'' (5th ed.). Alexandria, Virginia; American Geological Institute. p 61. A bedding surface or bedding plane is respectively a curved surface or Euclidean planes in three-dimensional space, plane that visibly separates each successive bed (of the same or different lithology) from the preceding or following bed. In Cross section (geology), cross sections, bedding surfaces or planes are often called bedding contacts. Within conformable successions, each bedding surface acted as the depositional surface for the accumulation of younger sediment. Definitions Specifically in sedimentology, a bed can be defined in one of two major ways.Davies, N.S., and Shillito, A.P. 2021, ''True substrates: the exceptional resolution and unexceptional preservation of de ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marl
Marl is an earthy material rich in carbonate minerals, Clay minerals, clays, and silt. When Lithification, hardened into rock, this becomes marlstone. It is formed in marine or freshwater environments, often through the activities of algae. Marl makes up the lower part of the White cliffs of Dover, cliffs of Dover, and the Channel Tunnel follows these marl layers between France and the United Kingdom. Marl is also a common sediment in post-glacial lakes, such as the marl ponds of the northeastern United States. Marl has been used as a soil conditioner and neutralizing agent for acid soil and in the manufacture of cement. Description Marl or marlstone is a carbonate mineral, carbonate-rich mud or mudstone which contains variable amounts of Clay minerals, clays and silt. The term was originally loosely applied to a variety of materials, most of which occur as loose, earthy deposits consisting chiefly of an intimate mixture of clay and calcium carbonate, formed under freshwa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
