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There are two basic types of metamorphic rocks: 1) foliated metamorphic rocks such as gneiss, phyllite, schist and slate which have a layered or banded appearance that is produced by exposure to heat and directed pressure; ... More Rock Collections: Sedimentary Rocks -- Igneous Rocks...
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geology.com/rocks/metamorphic-rocks.shtml
geology.com/rocks/metamorphic-rocks.shtml
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Metamorphic rock - Wikipedia, the free encyclopedia
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Metamorphic rock is the result of the transformation of an existing rock type, the protolith , in a process called metamorphism, which means "change in form". The protolith is subjected to heat and...
en.wikipedia.org/wiki/Metamorphic_rock
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Igneous rock - Wikipedia, the free encyclopedia
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Igneous rock (from the Latin ignis meaning fire ) is one of the three main rock types (the others being sedimentary and metamorphic rock). Igneous rock is formed by magma (molten rock) being cool...
en.wikipedia.org/wiki/Igneous_rock
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Although basalt is the most abundant of the lavas, granite is by far the commonest of the intrusive igneous rocks. Granite is mineralogically and chemically different from basalt and for many years geologists have wrestled with the problem of how the two rock types are related.
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www.rocks-rock.com/igneous-rocks.html
www.rocks-rock.com/igneous-rocks.html
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Just as any person can be put into one of two main categories of human being, all rocks can be put into one of three fundamentally different types of rocks. They are as follows: ... Igneous rocks are crystalline solids which form directly from the cooling of magma. This is an exothermic process (it loses heat) and involves...
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jersey.uoregon.edu/~mstrick/AskGeoMan/geoQuerry13.html
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What are the most important types of rock in the crust? ... Both are igneous rocks, which means that they cooled from a magma (the earth gets very hot just below the surface, and there is lots of liquid rock available). Both are made up of minerals from the silicate group, so both have large amounts of silicon and oxygen.
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jersey.uoregon.edu/~mstrick/AskGeoMan/geoQuerry27.html
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Discovering the two different types of igneous rocks. ... There are two types of igneous rocks, based on rates of cooling. Volcanic rocks cool quickly, and form on the Earth’s surface around volcanoes. These are sometimes referred to as "lava rocks." Lava refers to the molten rock, or magma, which cools to make...
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www.msnucleus.org/membership/html/k-6/rc/rocks/k/rcrk_2...
www.msnucleus.org/membership/html/k-6/rc/rocks/k/rcrk_2a.html
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Rock Cycle - Rocks (KA); Lab ... [Dictionary] ; [Back to Rock Cycle Grid] [Back to Rocks (K)]
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www.msnucleus.org/membership/html/k-6/rc/rocks/k/rcrk_2...
www.msnucleus.org/membership/html/k-6/rc/rocks/k/rcrk_2d.html
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There are three general types of rocks, those that form from melt (igneous rocks), those that are deposited from air or water (sedimentary rocks), ... Igneous rocks do this pretty well by excluding gases like argon and separating rubidium from strontium (these partition into different minerals during crystallization).
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topex.ucsd.edu/es10/lectures/lecture10/lecture10.html
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