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Igneous rock - Wikipedia, the free encyclopedia
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Igneous Rock Identification; Nature's Fiery Cauldron ... Igneous rocks are formed from the solidification of magma, which is a hot (600 deg.C - 1300 deg.C, or 1100 deg. - 2400 deg. F) molten or partially molten rock material. The Earth is composed predominantly of a large mass of igneous rock with a ... Igneous Rock Textures...
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This term refers to vesicles (holes, pores, or cavities) within the igneous rock. Vesicles are the result of gas expansion (bubbles), which often occurs during volcanic eruptions. Pumice and scoria are common types of vesicular rocks.
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On the earth's surface, there are three types of rocks, metamorphic, sedimentary, and igneous. In northern Canada, much of the hard rock found is igneous rock. Igneous rock is rock formed by the hardening and crystallization of molten material that originates deep within the earth.
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The three great rock classes--igneous, sedimentary and metamorphic--are introduced with igneous rocks. ... Igneous Rock Textures ... Igneous Rock Types: Basalt, Granite and More...
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A photo gallery of intrusive and extrusive rocks by Geology.com ... Igneous Rock Types Menu ... Andesite is a fine-grained, extrusive igneous rock composed mainly of plagioclase with other minerals such as hornblende, pyroxene and biotite. The specimen shown is about two inches (five centimeters) across.
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Rock formed from the cooling and solidification of molten rock called magma ... Rock formed from the cooling and solidification of molten rock called magma. The acidic nature of this rock type means that areas with underlying igneous rock are particularly susceptible to the effects of acid rain.
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ORGANIZATION OF THE IGNEOUS ROCK SIT ... SELF TEST; Alphabetical Listing; Bowen's Reaction Series ; Classification ; Igneous Rock distribution; Composition/Texture Key; Color/Texture Key ... Igneous Rock Evolution - home page; Phase Diagrams - home page; Solid Solution Phase Diagram - eg plagioclase feldspars;
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Igneous rocks form from molten rock which is either ejected at the surface of the earth or cools off underground. ... Once is has cooled, it is an extrusive igneous rock. EXTRUSIVE IGNEOUS ROCKS Extrusive igneous rock forms when molten rock reaches the earth's surface and cools. Air and moisture cool the lava rapidly.
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