2017-07-30T05:47:21+03:00[Europe/Moscow] en true Lava, Volcanic ash, Pumice, Andesite, Pyroclastic flow, Ring of Fire, Shield volcano, Volcanic field, Subaqueous volcano, Prediction of volcanic activity, List of Quaternary volcanic eruptions, Gregoryite, List of new islands, Rift zone flashcards Volcanology
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  • Lava
    (Further information: Magma) Lava is the molten rock expelled by a volcano during an eruption.
  • Volcanic ash
    Volcanic ash consists of fragments of pulverized rock, minerals and volcanic glass, created during volcanic eruptions and measuring less than 2 mm (0.079 inches) in diameter.
  • Pumice
    Pumice (pronunciation: /ˈpʌmᵻs/), called pumicite in its powdered or dust form, is a volcanic rock that consists of highly vesicular rough textured volcanic glass, which may or may not contain crystals.
  • Andesite
    Andesite (pronunciation: /ˈændᵻsaɪt/ or /ˈændᵻzaɪt/) is an extrusive igneous, volcanic rock, of intermediate composition, with aphanitic to porphyritic texture.
  • Pyroclastic flow
    A pyroclastic flow (also known scientifically as a pyroclastic density current) is a fast-moving current of hot gas and rock (collectively known as tephra), which reaches speeds moving away from a volcano of up to 700 km/h (450 mph).
  • Ring of Fire
    The Ring of Fire is a major area in the basin of the Pacific Ocean where a large number of earthquakes and volcanic eruptions occur.
  • Shield volcano
    A shield volcano is a type of volcano usually built almost entirely of fluid magma flows.
  • Volcanic field
    A volcanic field is an area of the Earth's crust that is prone to localized volcanic activity.
  • Subaqueous volcano
    A subaqueous volcano is a volcano formed beneath freshwater and never builds above lake level.
  • Prediction of volcanic activity
    Prediction of volcanic eruption (also: volcanic eruption forecasting) is an interdisciplinary monitoring and research effort to predict the time and severity of a volcano's eruption.
  • List of Quaternary volcanic eruptions
    This article is a list of volcanic eruptions of approximately magnitude 6 or more on the Volcanic Explosivity Index (VEI) or equivalent sulfur dioxide emission during the Holocene, and Pleistocene eruptions of the Decade Volcanoes (Avachinsky-Koryaksky, Kamchatka; Colima, Trans-Mexican Volcanic Belt; Mount Etna, Sicily; Galeras, Andes, Northern Volcanic Zone; Mauna Loa, Hawaii; Mount Merapi, Central Java; Mount Nyiragongo, East African Rift; Mount Rainier, Washington; Sakurajima, Kagoshima Prefecture; Santamaria/ Santiaguito, Central America Volcanic Arc; Santorini, Cyclades; Taal Volcano, Luzon Volcanic Arc; Teide, Canary Islands; Ulawun, New Britain; Mount Unzen, Nagasaki Prefecture; Mount Vesuvius, Naples); Campania, Italy; South Aegean Volcanic Arc; Laguna de Bay, Luzon Volcanic Arc; M
  • Gregoryite
    Gregoryite is an anhydrous carbonate mineral that is rich in potassium and sodium with formula: [(Na2,K2,Ca)CO3].
  • List of new islands
    Below is a list of new islands created since the beginning of the 20th century whether by means of volcanism, erosion, glacial retreat, or other mechanisms.
  • Rift zone
    A rift zone is a feature of some volcanoes, especially shield volcanoes, in which a linear series of fissures in the volcanic edifice allows lava to be erupted from the volcano's flank instead of from its summit.