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Rock Summary

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by

nicole boyes

on 27 April 2010

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Transcript of Rock Summary

ROCK SUMMARY Igneous Rocks The difference between plutonic and volcanic ingneous rocks :
Plutonic rocks are formed from cooling magma below the surface, and volcanic rocks are formed from cooling lava on the surface. Examples of igneous rocks:
Einige
Pumice
Basalt
Aplite
Gabbro
Dunite


Properties of igneous Rocks :
Are glassy or frothy in appearence
Full of bubbles
More dense
Be light enough to float (pumice)
Appear to be peppered with black speacks
They are most likey to be found on the surface of areas or current or past volcanism, deep underground, past or present glaciation areas. Sedimentary Rocks Examples of sedimentary rocks:
Dolostone
Shale
Mudstone
Limestone
Chalk
Claystone


Sedimentary rocks have
a hard rough texture Sedimentary rocks cover over 75%
of the earths surface Metamorphic Rocks Examples of metamorphic rocks:
Slate
Skarn
Marble
Pelite
Granulite
The properties of metamorphic Rocks:
Can be foliated or non foliated. Metamorphic Rocks are likely to be found
Everywhere in some depth, on surfaces where
uplift and erosian have allowed them to be visible
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