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  2. Hydrothermal explosion - Wikipedia

    en.wikipedia.org/wiki/Hydrothermal_explosion

    Small 2009 hydrothermal explosion in Biscuit Basin, Yellowstone National Park. Hydrothermal explosions occur when superheated water trapped below the surface of the Earth rapidly converts from liquid to steam, violently disrupting the confining rock. Boiling water, steam, mud, and rock fragments are ejected over an area of a few meters up to ...

  3. Glossary of geology - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_geology

    The hydrothermal deposition of economically important metals in the formation of ore bodies or "lodes". mineralogy miogeosyncline A geosyncline in which volcanism is not associated with sedimentation, or the non-volcanic part of the orthogeosyncline located near the craton. Mohs scale of mineral hardness. Also simply called the Mohs scale. molasse

  4. Vein (geology) - Wikipedia

    en.wikipedia.org/wiki/Vein_(geology)

    The hydraulic flow involved is usually due to hydrothermal circulation. [1] Veins are classically thought of as being planar fractures in rocks, with the crystal growth occurring normal to the walls of the cavity, and the crystal protruding into open space. This certainly is the method for the formation of some veins.

  5. Geothermal activity - Wikipedia

    en.wikipedia.org/wiki/Geothermal_activity

    Geysers are the most well known hydrothermal feature. [citation needed] They occur when groundwater in underground cavities becomes superheated under a lid of colder surface water. When the superheated water breaches the surface, it flashes to steam, causing the pressure below it to suddenly drop, which causes a chain reaction where most of the ...

  6. Geology - Wikipedia

    en.wikipedia.org/wiki/Geology

    Solidified lava flow in Hawaii Sedimentary layers in Badlands National Park, South Dakota Metamorphic rock, Nunavut, Canada. Geology (from Ancient Greek γῆ (gê) 'earth' and λoγία () 'study of, discourse') [1] [2] is a branch of natural science concerned with the Earth and other astronomical objects, the rocks of which they are composed, and the processes by which they change over time. [3]

  7. Geothermal areas of Yellowstone - Wikipedia

    en.wikipedia.org/wiki/Geothermal_areas_of...

    Other explorers in the region incorrectly assumed that the lake's name was spelled 'heart' because of its shape. The Heart Lake Geyser Basin begins a couple miles from the lake and descends along Witch Creek to the lakeshore. Five groups of hydrothermal features comprise the basin, and all of them contain geysers, although some are dormant. [22]

  8. Metasomatism - Wikipedia

    en.wikipedia.org/wiki/Metasomatism

    Metasomatism (from the Greek μετά metá "change" and σῶμα sôma "body") is the chemical alteration of a rock by hydrothermal and other fluids. [1] It is traditionally defined as metamorphism which involves a change in the chemical composition, excluding volatile components. [2]

  9. Spatial Mathematics: Theory and Practice through Mapping

    en.wikipedia.org/wiki/Spatial_Mathematics:...

    Stein praises the book's attempt to bridge mathematics and geography, and its potential use as a first step towards that bridge for practitioners. [2] Harris suggests it "in an introductory and applied context", and in combination with a more conventional textbook on geographic information systems.

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