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Pyroclastic Plateaus
Pyroclast, Pyroclastic or Pyroclastics may refer to: Geology * Pyroclast, or airborne volcanic tephra fragments * Pyroclastic rock, rock fragments produced and ejected by explosive volcanic eruptions * Pyroclastic cone, landform of ejecta from a volcanic vent * Pyroclastic fall, a uniform deposit of material ejected from a volcanic eruption * Pyroclastic flow, a fast-moving current of hot gas and volcanic matter * Pyroclastic Peak, a volcanic peak south of Mount Cayley in British Columbia, Canada * Pyroclastic shield, an uncommon type of shield volcano formed mostly of pyroclastic and highly explosive eruptions * Pyroclastic surge, a mass of turbulent ash and gas that occurs in some volcanic eruptions Other * Pyroclasts (album), ''Pyroclasts'' (album), 2019 instrumental album by Sunn O))) * Pyroclastics (album), ''Pyroclastics'' (album), 1992 album by Birdsongs of the Mesozoic See also * Pyro (other) * Volcanic ash {{Disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pyroclast
Tephra is fragmental material produced by a Volcano, volcanic eruption regardless of composition, fragment size, or emplacement mechanism. Volcanologists also refer to airborne fragments as pyroclasts. Once clasts have fallen to the ground, they remain as tephra unless hot enough to fuse into pyroclastic rock or tuff. When a volcano explodes, it releases a variety of tephra including ash, cinders, and blocks. These layers settle on the land and, over time, sedimentation occurs incorporating these tephra layers into the geologic record. Tephrochronology is a geochronological technique that uses discrete layers of tephra—volcanic ash from a single eruption—to create a chronological framework in which Paleoecology, paleoenvironmental or Archaeology, archaeological records can be placed. Often, when a volcano explodes, biological organisms are killed and their remains are buried within the tephra layer. These fossils are later dated by scientists to determine the age of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pyroclastic Rock
Pyroclastic rocks are clastic rocks composed of rock fragments produced and ejected by explosive volcanic eruptions. The individual rock fragments are known as pyroclasts. Pyroclastic rocks are a type of volcaniclastic deposit, which are deposits made predominantly of volcanic particles. 'Phreatic' pyroclastic deposits are a variety of pyroclastic rock that forms from volcanic steam explosions and they are entirely made of accidental clasts. 'Phreatomagmatic' pyroclastic deposits are formed from explosive interaction of magma with groundwater. The word ''pyroclastic'' is derived from the Greek , meaning fire; and , meaning broken. Unconsolidated accumulations of pyroclasts are described as tephra. Tephra may become lithified to a pyroclastic rock by cementation or chemical reactions as the result of the passage of hot gases (fumarolic alteration) or groundwater (e.g. hydrothermal alteration and diagenesis) and burial, or, if it is emplaced at temperatures so hot that the soft gla ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pyroclastic Cone
Volcanic cones are among the simplest volcanic landforms. They are built by ejecta from a volcanic vent, piling up around the vent in the shape of a cone with a central crater. Volcanic cones are of different types, depending upon the nature and size of the fragments ejected during the eruption. Types of volcanic cones include stratocones, spatter cones, tuff cones, and cinder cones. Stratocone Stratocones are large cone-shaped volcanoes made up of lava flows, explosively erupted pyroclastic rocks, and igneous intrusives that are typically centered around a cylindrical vent. Unlike shield volcanoes, they are characterized by a steep profile and periodic, often alternating, explosive eruptions and effusive eruptions. Some have collapsed craters called calderas. The central core of a stratocone is commonly dominated by a central core of intrusive rocks that range from around to over several kilometers in diameter. This central core is surrounded by multiple generations of lav ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pyroclastic Fall
A pyroclastic fall deposit is a uniform deposit of material which has been ejected from a volcanic eruption or plume such as an ash fall or tuff. Pyroclastic fallout deposits are a result of: # Ballistic transport of ejecta such as volcanic blocks, volcanic bombs and lapilli from volcanic explosions # Deposition of material from convective clouds associated with pyroclastic flows such as coignimbrite falls # Ejecta carried in gas streaming from a vent. The material under the action of gravity will settle out from an eruption plume or eruption column #Ejecta settling from an eruptive plume or eruption column that is displaced laterally by wind currents and is dispersed over great distances Structures The deposits of pyroclastic falls follow a well sorted and well bedded trend. They exhibit mantle bedding—the deposits directly overlie pre-existing topography and maintain a uniform thickness over relatively short distances. Sorting by size is more pronounced than pyroclastic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pyroclastic Flow
A pyroclastic flow (also known as a pyroclastic density current or a pyroclastic cloud) is a fast-moving current of hot gas and volcanic matter (collectively known as tephra) that flows along the ground away from a volcano at average speeds of but is capable of reaching speeds up to . The gases and tephra can reach temperatures of about . Pyroclastic flows are the deadliest of all volcanic hazards and are produced as a result of certain explosive eruptions; they normally touch the ground and hurtle downhill or spread laterally under gravity. Their speed depends upon the density of the current, the volcanic output rate, and the gradient of the slope. Origin of term The word ''pyroclast'' is derived from the Greek (''pýr''), meaning "fire", and (''klastós''), meaning "broken in pieces". A name for pyroclastic flows that glow red in the dark is (French, "burning cloud"); this was notably used to describe the disastrous 1902 eruption of Mount Pelée on Martinique, a Frenc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pyroclastic Peak
Pyroclastic Peak is the second highest of the five named volcanic peaks immediately south of Mount Cayley in British Columbia, Canada. It is steep and rotten and is located southwest of Callaghan Lake and west of Whistler. It is part of the Pacific Ring of Fire that includes over 160 active volcanoes. On the south ridge of Pyroclastic Peak is a feature known as The Vulcan's Thumb which remains unclimbed because of the looseness of the rock. See also * Cascade Volcanoes * Mount Cayley * Garibaldi Volcanic Belt * Volcanism of Canada * Volcanism of Western Canada * List of volcanoes in Canada List of volcanoes in Canada is an incomplete list of volcanoes found in Geography of Canada, mainland Canada, in the Islands of Canada, Canadian islands and in Canadian waters. All but two Provinces of Canada, provinces, Prince Edward Island and ... References Volcanoes of British Columbia Garibaldi Volcanic Belt Pyroclastic, Peak Pacific Ranges New Westminster Land Dis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pyroclastic Shield
In volcanology, a pyroclastic shield or ignimbrite shield is an uncommon type of shield volcano. Unlike most shield volcanoes, pyroclastic shields are formed mostly of pyroclastic and highly explosive eruptions rather than relatively fluid basaltic lava issuing from vents or fissures on the surface of the volcano. They typically display low-angle flank slopes and often have a central caldera caused by large eruptions. Lava is commonly extruded after explosive activity has ended. The paucity of associated Plinian fall deposits indicates that pyroclastic shields are characterized by low Plinian columns. Pyroclastic shields are commonly known to form in the Central Andes of South America, as well as in Melanesia (the island of Bougainville alone has two). There are also pyroclastic shields in Africa, such as Emi Koussi in Chad. Examples * Ambrym, Vanuatu * Apoyeque, Nicaragua * Masaya, Nicaragua * Billy Mitchell, Bougainville, Papua New Guinea * Emi Koussi, Chad * Laguna C ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pyroclastic Surge
A pyroclastic surge is a fluidised mass of turbulent gas and rock fragments that is ejected during some volcanic eruptions. It is similar to a pyroclastic flow but it has a lower density or contains a much higher ratio of gas to rock, which makes it more turbulent and allows it to rise over ridges and hills rather than always travel downhill as pyroclastic flows do. The speed of pyroclastic density currents has been measured directly via photography only in the case of Mount St. Helens, where they reached 320-470 km/h, or . Estimates of other modern eruptions are around 360 km/h, or 100 m/s (225 mph). Pyroclastic flows may generate surges. For example, the city of Saint-Pierre, Martinique, Saint-Pierre in Martinique in 1902 was overcome by one. Pyroclastic surge include 3 types, which are base surge, ash-cloud surge, and ground surge. Base surge Base surges were first recognized after the Taal Volcano eruption of 1965 in the Philippines, where a visiting vol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pyroclasts (album)
''Pyroclasts'' is the ninth studio album by American drone metal band Sunn O))). The album was released through Southern Lord Records on October 25, 2019. ''Pyroclasts'' was recorded and mixed by Steve Albini (Nirvana, Neurosis, Godspeed You! Black Emperor) entirely using analog tape. In addition to Greg Anderson and Stephen O'Malley, the album features collaborators Tos Nieuwenhuizen, Tim Midyett and Hildur Guðnadóttir. ''Pyroclasts'' was written and recorded alongside what has been described as a "sister album" or a "fraternal twin" album titled '' Life Metal'' that was released six months earlier on April 26, 2019. Sunn O))) plus additional collaborators live recorded a new 11-minute improvised drone session at the start or end of each day during the recording of ''Life Metal''. ''Pyroclasts'' is a collection of four of those tracks. The title refers to volcanic airborne pyroclastic rock. Critical reception Upon its release, ''Pyroclasts'' received positive reviews fro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pyroclastics (album)
''Pyroclastics'' is the third studio album by Birdsongs of the Mesozoic, released on 1992 by Cuneiform Records. It was their final album with founding guitarist Martin Swope. Track listing Personnel Adapted from ''Pyroclastics'' liner notes. ;Birdsongs of the Mesozoic * Ken Field – alto saxophone, soprano saxophone, synthesizer, percussion * Erik Lindgren – piano, sampler, electronic drums, percussion * Rick Scott – synthesizer, percussion * Martin Swope – guitar, percussion ;Additional musicians * Willie Alexander – percussion (4, 7) * Ken Winokur – percussion (4, 6) ;Production and additional personnel * Birdsongs of the Mesozoic – production * Stephen Elston – illustrations, design, photography * Nancy Given – illustrations, design * Roger Seibel – mastering * Scott Sternbach – photography * Bob Winsor – production, mixing, recording A record, recording or records may refer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pyro (other)
Pyro comes from the Greek word πῦρ (pyr), meaning ''fire''. It may refer to: Businesses * Pyro Plastics Corporation, a plastic model kit maker 1940s through the 1970s * Pyro Studios, a computer game developer based in Madrid * NRK P3 Pyro, a Norwegian Internet-based music radio station Entertainment * "Pyro" (song), by Kings of Leon, 2010 * "Pyro", a song by T.S.O.L. from their 2001 album '' Disappear'' * "Pyro", a song by Hail the Villain from their 2010 album '' Population: Declining'' * "Pyro", a song by the Standstills from their 2012 album '' Pushing Electric'' * "Pyro", a song by 2:54 from their 2014 album '' The Other I'' * "Pyro", a song by Shinedown from their 2018 album '' Attention Attention'' * "Pyro", a song by Budjerah from his 2021 self-titled EP * "Pyro (leak 2019)", a song by Denzel Curry and Kenny Beats from their 2020 EP '' Unlocked'' * Pyro (Marvel Comics), a Marvel Comics supervillain * Pyro (''Team Fortress 2''), one of the playable classes in the vide ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
