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- By Computers II Class 06/07
- Barak Barclay, Matt Bell, Baron Decker, Chase Hern, Brick Kizk, Michael
Peterson, and Cody Wilson
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- Any rock that has cooled from molten rock.
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- Magma - Liquid rock under the ground.
- Lava - Liquid rock above the ground.
- Intrusive Igneous Rocks - Rocks that cool from a melt below the ground.
- Extrusive Igneous Rocks –Rocks that cool from a melt above the ground
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- Rocks formed by compaction of clasts, a chemical precipitate, or an
evaporative residue.
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- Clastic Sedimentary Rocks - Sedimentary rocks formed from compacted
clasts (particles of rock)
- Non-Clastic Sedimentary Rocks - Sedimentary rocks formed from compacted
precipitates or evaporate residues.
- Sedimentary rocks can contain fossils.
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- A compacted calcium sulfate residue from evaporated water is called
gypsum.
- A compacted calcium carbonate precipitate is called limestone.
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- Rocks that have been changed by heat and pressure without melting.
- (Deep under the earth there is a lot of pressure from the overlying
weight of layers above and there is heat.)
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- Almost any rock, if metamorphosed enough can turn into schist or gneiss.
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- Marble is essentially limestone that was metamorphosed.
- Quartzite is essentially sandstone, which is mostly quartz sand grains,
that was metamorphosed.
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- Any rock can become a clastic sedimentary rock if it is weathered into
clasts (particles) and then the clasts are compacted.
- Any rock can become a non-clastic sedimentary rock if it is dissolved in
water. Then the dissolved minerals could come out of the water by
evaporation or as a precipitate.
And finally the evaporate residue or precipitate is compacted
into rock.
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- Any rock can become an igneous rock if it is melted to a liquid and then
is cooled back into a solid.
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- Any rock can become a metamorphic rock if it is changed by heat and
pressure but not melted.
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- The End.
- Now click the Rocks Quiz to see what you can remember from this
presentation.
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Notes
