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  2. File:WikiReader Decade Volcanoes.pdf - Wikipedia

    en.wikipedia.org/wiki/File:WikiReader_Decade...

    Main page; Contents; Current events; Random article; About Wikipedia; Contact us

  3. Mud volcano - Wikipedia

    en.wikipedia.org/wiki/Mud_volcano

    A mud volcano or mud dome is a landform created by the eruption of mud or slurries, water and gases. [1] [2] [3] Several geological processes may cause the formation of mud volcanoes. Mud volcanoes are not true igneous volcanoes as they do not produce lava and are not necessarily driven by magmatic activity.

  4. Volcanogenic massive sulfide ore deposit - Wikipedia

    en.wikipedia.org/wiki/Volcanogenic_massive...

    Cool ocean water is drawn into the hydrothermal zone and is heated by the volcanic rock and is then expelled into the ocean, the process enriching the hydrothermal fluid in sulfur and metal ions. The ore materials are trapped within a fumarole field or a black smoker field when they are expelled into the ocean, cool, and precipitate sulfide ...

  5. Deformation (volcanology) - Wikipedia

    en.wikipedia.org/wiki/Deformation_(volcanology)

    Deformation is a key indicator of pre-eruptive unrest at many active volcanoes, but deformation signals must be used in combination with other eruption indicators for forecasting reliability. [ 3 ] Magma movement processes

  6. Geology of the Pacific Northwest - Wikipedia

    en.wikipedia.org/wiki/Geology_of_the_Pacific...

    Volcanoes of the Garibaldi Volcanic Belt have been sporadically active over a time span of several millions of years. The northernmost member, the Mount Meager massif, was responsible for a major catastrophic eruption that occurred about 2,350 years ago. This eruption may have been close in size to that of the 1980 eruption of Mount St. Helens.

  7. Types of volcanic eruptions - Wikipedia

    en.wikipedia.org/wiki/Types_of_volcanic_eruptions

    The process powering Plinian eruptions starts in the magma chamber, where dissolved volatile gases are stored in the magma. The gases vesiculate and accumulate as they rise through the magma conduit. These bubbles agglutinate and once they reach a certain size (about 75% of the total volume of the magma conduit) they explode.

  8. Geology of Chile - Wikipedia

    en.wikipedia.org/wiki/Geology_of_Chile

    Since Chile is on an active continental margin, it has many volcanoes. Almost the entire country is subject to earthquakes arising from strains in the Nazca and Antarctic plates or shallow strike-slip faults. Northern Chilean mineral resources are a major economic resource, and the country is the leading producer of copper, lithium and molybdenum.

  9. Magma chamber - Wikipedia

    en.wikipedia.org/wiki/Magma_chamber

    Often, a volcano may have a deep magma chamber many kilometers down, which supplies a shallower chamber near the summit. The location of magma chambers can be mapped using seismology : seismic waves from earthquakes move more slowly through liquid rock than solid, allowing measurements to pinpoint the regions of slow movement which identify ...