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  2. Magma chamber - Wikipedia

    en.wikipedia.org/wiki/Magma_chamber

    Magma chambers above a subducting plate. Magma rises through cracks from beneath and across the crust because it is less dense than the surrounding rock. When the magma cannot find a path upwards it pools into a magma chamber. These chambers are commonly built up over time, [4] [5] by successive horizontal [6] or vertical [7] magma injections

  3. Volcanic and igneous plumbing systems - Wikipedia

    en.wikipedia.org/wiki/Volcanic_and_igneous...

    Magma emplacement can take place at any depth above the source rock. [4] Magma emplacement is primarily controlled by the internal forces of magma including buoyancy and magma pressure. [2] Magma pressure changes with depth as vertical stress is a function of the depth. [20] Another parameter of magma emplacement is the rate of magma supply. [2]

  4. Types of volcanic eruptions - Wikipedia

    en.wikipedia.org/wiki/Types_of_volcanic_eruptions

    Magma chamber) Phreatic eruptions (or steam-blast eruptions) are a type of eruption driven by the expansion of steam. When cold ground or surface water come into contact with hot rock or magma it superheats and explodes, fracturing the surrounding rock [63] and thrusting out a mixture of steam, water, ash, volcanic bombs, and volcanic blocks. [64]

  5. Volcano - Wikipedia

    en.wikipedia.org/wiki/Volcano

    A volcano needs a reservoir of molten magma (e.g. a magma chamber), a conduit to allow magma to rise through the crust, and a vent to allow the magma to escape above the surface as lava. The erupted volcanic material (lava and tephra) that is deposited around the vent is known as a volcanic edifice , typically a volcanic cone or mountain.

  6. Surface features of Venus - Wikipedia

    en.wikipedia.org/wiki/Surface_features_of_Venus

    The trapping of a magma chamber allows long-term eruption, and results in magma flows that may create large volcanic domes and flow deposits. The extrusion of magma to the surface is often linked to rifting or extensional tectonics in the region, and the shape of the dome or magma flow field is determined by the chemistry and viscosity of the ...

  7. Scientists track changes at the Yellowstone supervolcano ...

    www.aol.com/scientists-track-changes-yellowstone...

    The mapping was done using magnetotellurics that measure the electrical conductivity of what lies below the Earth’s surface. Melted rock, magma, is extremely good at conducting electricity, so ...

  8. Strombolian eruption - Wikipedia

    en.wikipedia.org/wiki/Strombolian_eruption

    The most energetic Strombolian eruptions are sometimes termed "Violent Strombolian" by volcanologists. [2] Such eruptions are associated with higher magma gas content, leading to a turbulent churn flow regime in the conduit, producing stronger and much more frequent explosions.

  9. Exhumed mantle - Wikipedia

    en.wikipedia.org/wiki/Exhumed_mantle

    Diagram of a megamullion of exhumed mantle. In normal rates of seafloor spreading, the space created by rifting along a mid-ocean ridge is filled by magma, forming the standard oceanic crust, with a central magma chamber, crystallising out as gabbros and utramafic cumulates, feeding volcanic rocks (typically pillow lavas) via systems of dykes.

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