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The Theraphosinae are a large subfamily of Mygalomorphae spiders in the family Theraphosidae found primarily in the Neotropical realm. Genera
Kankuamo marquezi is the only species within the monotypic spider genus Kankuamo, in the family Theraphosidae.It is found in the Sierra Nevada de Santa Marta, Colombia.This spider has urticating hairs, the first to be classified as type VII.
The lower oceanic crust connects the Earth's mantle with the MORB, where around 60% of the total magma production of the Earth happens. The three main processes happening in this region of the oceanic crust are partial melting of the Earth's mantle, melt accumulation at various depths and the chemical modification of this melts during ascent,.
During magma's storage in the crust, its composition may be modified by fractional crystallization, contamination with crustal melts, magma mixing, and degassing. Following its ascent through the crust, magma may feed a volcano and be extruded as lava, or it may solidify underground to form an intrusion, [8] such as a dike, a sill, a laccolith ...
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.
Cumulate peridotite: dunite-rich layers of minerals that settled out from a magma chamber. Tectonized peridotite: harzburgite / lherzolite -rich mantle rock. A Geological Society of America Penrose Conference on ophiolites in 1972 defined the term "ophiolite" to include all of the layers listed above, including the sediment layer formed ...
The term tephrochronology appears to have been used by Sigurdur Thórarinsson as early as 1944. [6] A key point in the establishment of this scientific field of study with what evolved to be a unique geoscientific method was in 1961 after a proposal supported by him led by Japanese researchers including Professor Kunio Kobayashi resulted in the establishment of an international scientific group.
The deeper the magma chamber is located, the higher is the amount of gas that can be dissolved in the magma (high pressure conditions), especially in andesitic and rhyolitic magmas. As phase separation occurs and the liquid fraction increases along with decreasing pressure, the emission of gas increases.