Horst (geology) in the context of "Abyssal hill"

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⭐ Core Definition: Horst (geology)

In physical geography and geology, a horst is a raised fault block bounded by normal faults. Horsts are typically found together with grabens. While a horst is lifted or remains stationary, the grabens on either side subside. This is often caused by extensional forces pulling apart the crust. Horsts may represent features such as plateaus, mountains, or ridges on either side of a valley. Horsts can range in size from small fault blocks up to large regions of stable continent that have not been folded or warped by tectonic forces.

The word Horst, apart from being a common name, in general German refers to an "eagle's nest". The actual older meaning is "(wooded) hill top", "mass" or "heap", basically anything elevated. The term, as used in "Bergmannssprache", the special "language" of miners, was first adopted in the geological sense in 1883 by Eduard Suess in The Face of the Earth.

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👉 Horst (geology) in the context of Abyssal hill

An abyssal hill is a small hill that rises from the floor of an abyssal plain. They are the most abundant geomorphic structures on Earth, covering more than 30% of the ocean floor. Abyssal hills have relatively sharply defined edges and climb to heights of no more than a few hundred meters. They can be from a few hundred meters to kilometers in width. A region of the abyssal plain that is covered in such hill structures is termed an "abyssal-hills province". However, abyssal hills can also appear in small groups or in isolation.

The greatest abundance of abyssal hills occurs on the floor of thePacific Ocean. These Pacific Ocean hills are typically 50–300 m (160–980 ft) in height, with a width of 2–5 km (1.2–3.1 mi) and a length of 10–20 km (6.2–12.4 mi). They may be created along the flanks of the tectonically active East Pacific Rise as horst-and-graben features, then become stretched out with the passage of time. Abyssal hills may also be areas of thicker oceanic crust that were generated at the mid-ocean ridge during times of increased magma production.

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Horst (geology) in the context of Fault block

Fault blocks are very large blocks of rock, sometimes hundreds of kilometres in extent, created by tectonic and localized stresses in Earth's crust. Large areas of bedrock are broken up into blocks by faults. Blocks are characterized by relatively uniform lithology. The largest of these fault blocks are called crustal blocks. Large crustal blocks broken off from tectonic plates are called terranes. Those terranes which are the full thickness of the lithosphere are called microplates. Continent-sized blocks are called variously microcontinents, continental ribbons, H-blocks, extensional allochthons and outer highs.

Because most stresses relate to the tectonic activity of moving plates, most motion between blocks is horizontal, that is parallel to the Earth's crust by strike-slip faults. However vertical movement of blocks produces much more dramatic results. Landforms (mountains, hills, ridges, lakes, valleys, etc.) are sometimes formed when the faults have a large vertical displacement. Adjacent raised blocks (horsts) and down-dropped blocks (grabens) can form high escarpments. Often the movement of these blocks is accompanied by tilting, due to compaction or stretching of the crust at that point.

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Horst (geology) in the context of Rock and Pillar Range

The Rock and Pillar Range (Māori: Patearoa), is a range of high hills is located in the Maniototo, an area of inland Otago, New Zealand. The range is surrounded on three sides by the Taieri River, which has its source in the Lammerlaw Range. The river flows out across the scroll plain at Paerau, along the north west flanks of the Rock and Pillar Range before almost doubling back on itself at Waipiata and flowing back along the eastern side past Hyde through the Strath-Taieri. The town of Middlemarch lies close to the Taieri River to the east of the range, and Patearoa lies to the northwest.

The Rock and Pillars are a horst range, caused by movement on two parallel faults uplifting the area in between. Thus, the range is characterised by a very flat top, with steep escarpments on either side. The Great Moss Swamp lies on the upper surface of the range. There is a often persistent and unusual cloud formation associated with the range. This strange cloud formation, is more or less stationary and is called the Taieri Pet by the local inhabitants. It is formed by high north-westerly winds being forced upward over the Rock & Pillar range. Big Hut, situated near the summit of the range, is available for public use.

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Horst (geology) in the context of Satpura Range

The Satpura Range (IPA: [sət̪pʊɽaː]), formerly also known as the Seeonee Hills, is a range of hills in central India. The range rises in eastern Gujarat running east through the border of Maharashtra and Madhya Pradesh and ends in Chhattisgarh. The range parallels the Vindhya Range to the north, and these two east–west ranges divide the Indian subcontinent into the Indo-Gangetic Plain of northern India and the Deccan Plateau of the south. The Narmada River originates from the north-eastern end of Satpura in Amarkantak, and runs in the depression between the Satpura and Vindhya ranges, draining the northern slope of the Satpura range, running west towards the Arabian Sea. The Tapti River originates in the eastern-central part of Satpura, crossing the range in the center and running west at the range's southern slopes before meeting the Arabian Sea at Surat, draining the central and southern slopes of the range. Multai, the place of Tapti river origin is located about 465 kilometer far, south-westerly to Amarkantak, separated across by the hill range. The Godavari River and its tributaries drain the Deccan Plateau, which lies south of the range, and the Mahanadi River drains the easternmost portion of the range. The Godavari and Mahanadi rivers flow into the Bay of Bengal. At its eastern end, the Satpura range meets the hills of the Chotanagpur Plateau. The Satpura Range is a horst mountain and is flanked by Narmada Graben in the north and the much smaller but parallel Tapi Graben in the south.

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Horst (geology) in the context of Falkonera

Falkonera (Greek: Φαλκονέρα) or Gerakoulia (Γερακούλια), anciently known as Hierakia (Ἱεράκια), is a small uninhabited Greek island in the southwestern Aegean Sea, between the island of Milos and the Peloponnese region. Although outside the Saronic Gulf, it is generally included among the Saronic Islands. The islet marks the summit of a horst tending WNW-ESE, which separates the Myrtoon basin to the north from the Cretan basin to the south.

The island is administered as part of the Islands regional unit, part of the municipality of Spetses. Located at the crossing of the PiraeusChania and Cape Maleasİzmir shipping lanes, it is considered a significant navigational hazard due to the strong surrounding currents. At the island's eastern cape, named Panaghia ton revmaton (Παναγιά των Ρευμάτων), meaning "Panagia of the currents", there is a lighthouse that was destroyed by the Germans in 1941 and rebuilt after World War II. The highest point of the island is 183 meters above sea level.

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Horst (geology) in the context of Mount Epomeo

Mount Epomeo (Italian: Monte Epomeo) is the highest mountain on the volcanic island of Ischia, in the Gulf of Naples, Italy. Epomeo is believed to be a volcanic horst.

Reaching a height of 789 metres (2,589 ft), it towers above the rest of Ischia. Much of Epomeo is covered in lush greenery, with a few vineyards also occupying its slopes. Approximately 75 metres (246 ft) from the peak; the mountain is covered in white lava.

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Horst (geology) in the context of Požega Valley

The Požega Valley (Croatian: Požeška kotlina) is a geographic microregion of Croatia, located in central Slavonia, encompassing the eastern part of the Požega-Slavonia County. It is located in the Pannonian Basin, bounded by Psunj, Papuk and Krndija mountains from west and north, and Požeška Gora and Dilj from south and east, as the Pannonian plain is interspersed by horst and graben structures. The largest settlement in the region is the city of Požega, followed by Pleternica and Kutjevo. The main watercourse in the region is Orljava River. The region covers 1,249 square kilometres (482 square miles) and has a population of 60,599.

The Požega Valley was first inhabited in the prehistoric era, with archaeological finds spanning the Neolithic to classical antiquity and the Early Middle Ages, the period to which the oldest surviving historical records of the region date. Between the 13th and the 16th centuries, the region was organized as the centre of the Požega County and a royal estate. Ottoman rule in the region lasted for about 150 years—from the 1530s to the 1680s. During that time, the area was the centre of Sanjak of Pojega. Subsequently, the city of Osijek became the administrative and military centre of the newly formed Kingdom of Slavonia from Požega.

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