ROCK TYPES
Read this website about the 3 different types of rocks: http://www.geography4kids.com/files/earth_rocktypes.html
Copy these notes onto looseleaf BY HAND to be submitted next class:
(click on the links to see photos of the various rock samples in each category)
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Igneous
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Sedimentary
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Metamorphic
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Meaning of Name:
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“fire” – Latin: ignis
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Made up of material called sediments
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“change form” in Greek
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Formation:
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Solidification of hot liquid magma from volcanoes.
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Accumulation & cementing of sedimentary deposits over time. The sediments are created by weathering (gravity, water, wind . . . )
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Intense heat & pressure deep inside the earth changes rocks from one type to another.
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Special Types:
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a)Intrusive: liquid magma cools slowly under the earth’s surface.
eg. Granite
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a)Detrital / Clastic: made of pieces of other rocks
eg. Sandstone, shale
c) Chemical: made when a solid solute is extracted from a liquid solvent through evaporation
eg. Gypsum, halite (rock salt)
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b)Regional: caused by movement of tectonic plates (pressure)
eg. Schist, gneiss, slate
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