|
Intrusive Suite
An intrusive suite is a group of igneous intrusions related in time and space.Glazner, Allen F, Stock, Greg M. (2010). ''Geology Underfoot in Yosemite''. Mountain Press, p. 45. . All rocks in an intrusive suite result from the same magma-producing event.The Geologic Story of Yosemite National Park (1987), “Rocks, the building materials,” by N. King HuberIntrusive Suite accessdate: April 4, 2017 See also * Extrusive rock Extrusive rock refers to the mode of igneous volcanic rock formation in which hot magma from inside the Earth flows out (extrudes) onto the surface as lava or explodes violently into the atmosphere to fall back as pyroclastics or tuff. In cont ... References Igneous petrology {{igneous-petrology-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Georgetown Intrusive Suite - Granite Dike (4802243518)
Georgetown or George Town may refer to: Places Africa *George, South Africa, formerly known as Georgetown * Janjanbureh, Gambia, formerly known as Georgetown *Georgetown, Ascension Island, main settlement of the British territory of Ascension Island Asia * Georgetown, Prayagraj, India *George Town, Chennai, India *George Town, Penang, capital city of the Malaysian state of Penang Europe * Georgetown, Blaenau Gwent, now part of the town of Tredegar in Wales * Georgetown, Dumfries and Galloway, a location in Dumfries and Galloway, Scotland *Es Castell in Minorca, Spain, originally called Georgetown North and Central America Canada *Georgetown, Alberta * Georgetown, Newfoundland and Labrador *Georgetown, Ontario *Georgetown, Prince Edward Island Caribbean *George Town, Bahamas, a village in Exuma District, Bahamas * George Town, Belize, a village in Stann Creek District, Belize *George Town, Cayman Islands, the capital city on Grand Cayman * Georgetown, Saint Vincent and the Gren ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Igneous Intrusion
In geology, an igneous intrusion (or intrusive body or simply intrusion) is a body of intrusive igneous rock that forms by crystallization of magma slowly cooling below the surface of the Earth. Intrusions have a wide variety of forms and compositions, illustrated by examples like the Palisades Sill of New York and New Jersey; the Henry Mountains of Utah; the Bushveld Igneous Complex of South Africa; Shiprock in New Mexico; the Ardnamurchan intrusion in Scotland; and the Sierra Nevada Batholith of California. Because the solid country rock into which magma intrudes is an excellent insulator, cooling of the magma is extremely slow, and intrusive igneous rock is coarse-grained ( phaneritic). Intrusive igneous rocks are classified separately from extrusive igneous rocks, generally on the basis of their mineral content. The relative amounts of quartz, alkali feldspar, plagioclase, and feldspathoid is particularly important in classifying intrusive igneous rocks. Int ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Magma
Magma () is the molten or semi-molten natural material from which all igneous rocks are formed. 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. Besides molten rock, magma may also contain suspended crystals and volcanic gas, gas bubbles. Magma is produced by melting of the mantle (geology), mantle or the Crust (geology), crust in various tectonics, tectonic settings, which on Earth include subduction zones, continental rift (geology), rift zones, mid-ocean ridges and Hotspot (geology), hotspots. Mantle and crustal melts migrate upwards through the crust where they are thought to be stored in magma chambers or trans-crustal crystal mush, crystal-rich mush zones. During magma's storage in the crust, its composition may be modified by Fractional crystallization (geology), fractional crystallization, contaminati ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Extrusive Rock
Extrusive rock refers to the mode of igneous volcanic rock formation in which hot magma from inside the Earth flows out (extrudes) onto the surface as lava or explodes violently into the atmosphere to fall back as pyroclastics or tuff. In contrast, intrusive rock refers to rocks formed by magma which cools below the surface.Jain, Sreepat (2014). ''Fundamentals of Physical Geology''. New Delhi, India: Springer. . The main effect of extrusion is that the magma can cool much more quickly in the open air or under seawater, and there is little time for the growth of crystals. Sometimes, a residual portion of the matrix fails to crystallize at all, instead becoming a natural glass like obsidian. If the magma contains abundant volatile components which are released as free gas, then it may cool with large or small vesicles (bubble-shaped cavities) such as in pumice, scoria, or vesicular basalt. Other examples of extrusive rocks are rhyolite and andesite. Texture The textur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
