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  2. Magmatism - Wikipedia

    en.wikipedia.org/wiki/Magmatism

    Not to be confused with Magnetism. Magmatism is the emplacement of magma within and at the surface of the outer layers of a terrestrial planet, which solidifies as igneous rocks. It does so through magmatic activity or igneous activity, the production, intrusion and extrusion of magma or lava. Volcanism is the surface expression of magmatism.

  3. Sill (geology) - Wikipedia

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

    Sill (geology) Illustration showing the difference between a dike and a sill. In geology, a sill is a tabular sheet intrusion that has intruded between older layers of sedimentary rock, beds of volcanic lava or tuff, or along the direction of foliation in metamorphic rock. A sill is a concordant intrusive sheet, meaning that it does not cut ...

  4. Magma - Wikipedia

    en.wikipedia.org/wiki/Magma

    Magma (sometimes colloquially but incorrectly referred to as lava by laypeople) is found beneath the surface of the Earth, and evidence of magmatism has also been discovered on other terrestrial planets and some natural satellites. [3] Besides molten rock, magma may also contain suspended crystals and gas bubbles.

  5. Central Atlantic magmatic province - Wikipedia

    en.wikipedia.org/wiki/Central_Atlantic_magmatic...

    Last eruption. Hettangian. The Central Atlantic magmatic province ( CAMP) is the Earth's largest continental large igneous province, covering an area of roughly 11 million km 2. It is composed mainly of basalt that formed before Pangaea broke up in the Mesozoic Era, near the end of the Triassic and the beginning of the Jurassic periods.

  6. Igneous differentiation - Wikipedia

    en.wikipedia.org/wiki/Igneous_differentiation

    Igneous differentiation. In geology, igneous differentiation, or magmatic differentiation, is an umbrella term for the various processes by which magmas undergo bulk chemical change during the partial melting process, cooling, emplacement, or eruption.

  7. Volcanic crater - Wikipedia

    en.wikipedia.org/wiki/Volcanic_crater

    Volcanic crater. A volcanic crater is an approximately circular depression in the ground caused by volcanic activity. [1] It is typically a bowl-shaped feature containing one or more vents. During volcanic eruptions, molten magma and volcanic gases rise from an underground magma chamber, through a conduit, until they reach the crater's vent ...