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  2. Felsic - Wikipedia

    en.wikipedia.org/wiki/Felsic

    In geology, felsic is a modifier describing igneous rocks that are relatively rich in elements that form feldspar and quartz. [1] It is contrasted with mafic rocks, which are richer in magnesium and iron. Felsic refers to silicate minerals, magma, and rocks which are enriched in the lighter elements such as silicon, oxygen, aluminium, sodium ...

  3. Types of volcanic eruptions - Wikipedia

    en.wikipedia.org/wiki/Types_of_volcanic_eruptions

    Eruptions can last anywhere from hours to days, with longer eruptions being associated with more felsic volcanoes. Although they are usually associated with felsic magma, Plinian eruptions can occur at basaltic volcanoes, if the magma chamber differentiates with upper portions rich in silicon dioxide, [40] or if magma ascends rapidly. [42]

  4. Archean felsic volcanic rocks - Wikipedia

    en.wikipedia.org/wiki/Archean_felsic_volcanic_rocks

    Felsic eruption forms felsic volcanic rocks near the volcano and a spectrum of volcano-sedimentary sequence in the sea in Archean. [1] Archean felsic volcanic rocks are felsic volcanic rocks that were formed in the Archean Eon (4 to 2.5 billion years ago). [2] The term "felsic" means that the rocks have silica content of 62–78%. [3]

  5. Volcano - Wikipedia

    en.wikipedia.org/wiki/Volcano

    A volcano is a rupture in the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface. The process that forms volcanoes is called volcanism. On Earth, volcanoes are most often found where tectonic plates are diverging or converging, and because most of Earth ...

  6. Mountain Men (TV series) - Wikipedia

    en.wikipedia.org/wiki/Mountain_Men_(TV_series)

    Tom Oar, a former rodeo cowboy, resides near the Yaak River in northwestern Montana with his wife Nancy and their dog Ellie. Facing a seven-month winter season, the pair work hard, with the help of their neighbors, to prepare. Tom is an accomplished tanner of game animal pelts using natural Native American methods.

  7. 'High threat' supervolcano could bring about an ice age when ...

    www.aol.com/news/2017-03-30-high-threat-super...

    A long-quiet yet massive super volcano, dubbed the "Long Valley Caldera," has the potential to unleash a fiery hell across the planet, and the magma-filled mountain has a history of doing so.

  8. Magma - Wikipedia

    en.wikipedia.org/wiki/Magma

    Magma (sometimes colloquially but incorrectly referred to as lava) 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.

  9. Mount Mazama - Wikipedia

    en.wikipedia.org/wiki/Mount_Mazama

    Mount Mazama (Tum-sum-ne in the Native American language Klamath [5]) is a complex volcano in the western U.S. state of Oregon, in a segment of the Cascade Volcanic Arc and Cascade Range. The volcano is in Klamath County, in the southern Cascades, 60 miles (97 km) north of the Oregon– California border. Its collapse, due to the eruption of ...