How does the grain size change from slate to schist? how does the texture of phyllite differ from that of schist? why do you think the micas in these rocks are all parallel?

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04-08-2022
Social Studies

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How does the grain size change from slate to schist? how does the texture of phyllite differ from that of schist? why do you think the micas in these rocks are all parallel?

Sagot :

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tutorconsortium346 tutorconsortium346 · Answer 1 · 2022-08-09T09:26:20-04:00

Schist is a medium grade sheet-like grain rock, whereas slate is hard and fine-grained rocks with a salty cleft that is caused by the formation of minerals as a result of the metamorphic of the grain ground rocks.

What is slate?

Through low-grade regional metamorphism, slate is transformed from an original shale-type sedimentary rock made of clay or volcanic ash into a fine-grained, foliated, homogenous metamorphic rock. It is the foliated metamorphic rock with the finest grain size.
Foliation may occur in planes that are not parallel to the direction of metamorphic compression and instead line up with the original sedimentary layers.
Slate's foliation is known as "slaty cleavage." Strong compression is what causes fine-grained clay flakes to grow back in planes perpendicular to the compression, which is what causes it.
Many slates exhibit a feature called fissility when carefully "cut" by striking parallel to the foliation, with a specialized tool in the quarry. This results in smooth flat sheets of stone that have long been used for roofing, floor tiles, and other purposes.

Because of its extremely tiny grain size and flat grains, phyllite has a particularly sparkly texture. The largest grain size is seen in schist. Schists are made up of scales, whereas phyllite has a foliated texture.

Muscovite and biotite are two minerals that are frequently found in micas and produce the parallel, extremely fine-grained flakes of rock that are seen in igneous rocks with feldspar and quartz.
Phyllite, schist, gneiss, and slate are the rocks with the lowest grades, respectively.

Know more about slate with the help of the given link:

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How does the grain size change from slate to schist? how does the texture of phyllite differ from that of schist? why do you think the micas in these rocks are all parallel?

Sagot :

What is slate?

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