- volcanic formation
- вулканогенная формация
Англо-русский словарь нефтегазовой промышленности. 2011.
volcanic formation
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Volcanic ash — consists of small tephra, which are bits of pulverized rock and glass created by volcanic eruptions,United States Geological Survey. [http://volcanoes.usgs.gov/Hazards/What/Tephra/tephra.html Tephra: Volcanic Rock and Glass Fragments.] Retrieved… … Wikipedia
Volcanic pipe — Volcanic pipes are geological structures formed by the violent, supersonic eruption of deep origin volcanoes. They are considered to be a type of diatreme . Volcanic pipes are composed of a deep, narrow cone of solidified magma (described as… … Wikipedia
Volcanic arc — Mariana Islands, an oceanic island arc A volcanic arc is a chain of volcanoes positioned in an arc shape as seen from above. Offshore volcanoes form islands, resulting in a volcanic island arc. Generally they result from the subduction of an… … Wikipedia
Volcanic belt — [ Trans Mexican Volcanic Belt in Mexico ] A volcanic belt is a large volcanically active region. Other terms are used for smaller areas of activity, such as volcanic fields. Volcanic belts are found above zones of unusually high temperature (700… … Wikipedia
Formation evaluation gamma ray — In the field of formation evaluation, gamma ray log records natural radioactivity emission of formation. Measurement of natural emission of gamma rays in oil and gas wells are particularly helpful because shales and sandstones typically have… … Wikipedia
Formation (stratigraphy) — A formation or geological formation is the fundamental unit of lithostratigraphy. A formation consists of a certain number of rock strata that have a comparable lithology, facies or other similar properties. Formations are not defined on the… … Wikipedia
volcanic crater — noun a bowl shaped geological formation at the top of a volcano • Syn: ↑crater • Hypernyms: ↑geological formation, ↑formation • Hyponyms: ↑caldera, ↑maar • … Useful english dictionary
Non-volcanic passive margins — (NVPM) constitute one end member of the transitional crustal types that lie beneath passive continental margins; the other end member being volcanic passive margins (VPM). Transitional crust welds continental crust to oceanic crust along the… … Wikipedia
Masset Formation — Stratigraphic range: Tertiary Type Geological formation Lithology Primary Calc alkaline volcanic rocks Location … Wikipedia
Pebble Creek Formation — is a volcanic formation in the Garibaldi Volcanic Belt created when Mount Meager erupted about 2,350 years ago and by two rock avalanche deposits. [http://cat.inist.fr/?aModele=afficheN cpsidt=1746803 CAT.INIST: Pebble Creek Formation] Retrieved… … Wikipedia
Geology of the Lassen volcanic area — The geology of the Lassen volcanic area presents a record of sedimentation and volcanic activity in the area in and around Lassen Volcanic National Park in Northern California, U.S.. The park is located in the southernmost part of the Cascade… … Wikipedia
