| 1. | Cleavage is a type of secondary foliation associated with fine grained rocks.
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| 2. | For coarser grained rocks, schistosity is used to describe secondary foliation.
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| 3. | Because of this quick cooling, the basalt is a fine-grained rock.
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| 4. | Shale is a fine-grained rock made of ancient silt and clay.
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| 5. | These are fine-grained rocks, not usually banded, nearly black in color with small red spots of garnet.
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| 6. | They are dark, fine-grained rocks, containing a few visible crystals of the minerals olivine, plagioclase, and quartz.
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| 7. | Coarse grained rocks are formed very slowly, while fine grained rocks are formed quickly, on geological time scales.
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| 8. | Coarse grained rocks are formed very slowly, while fine grained rocks are formed quickly, on geological time scales.
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| 9. | The formation holds natural gas in a fine-grained rock matrix which requires hydraulic fracturing to release the gas.
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| 10. | Conglomerates are coarse grained rocks dominantly composed of gravel sized particles that are typically held together by a finer grained matrix.
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