Slate Facts

Slate Facts
Slate is a metamorphic rock that forms from mudstone or shale. The mudstone or shale normally contains clay or volcanic ash. Slate is unique in that it does not require any type of cementation to hold its particles together. It has a very attractive appearance and it is also durable.
Interesting Slate Facts:
Slate is mostly made of clay but the clay can change to mica under extreme degrees of pressure.
The color of slate is largely determined by the amount of iron it contains, but it is normally a shade of gray.
Slate normally forms in basins between convergent plate boundaries.
Often, slate is used to describe shale but the two are different in that shale is actually converted into slate.
Slate is used for different varieties of flooring and roofing.
School children used pieces of slate as a writing board to practice their math and writing during the 1800s.
Slate can easily be broken into neat, thin sheet because of its foliation.
The majority of mined slate is used for roofing because it does not absorb a lot of water and can withstand freezing air.
Slate is very expensive to make and install.
Chalk boards are made of slate and chalk is made of limestone, another type of rock.
Slate is used to make turkey calls which are devices that mimic the sound of different turkeys and used by hunters.
Slate has a wet-like appearance when exposed to the sun.
Slate is produced worldwide but the best slate is said to come from certain countries such as Brazil and the United Kingdom.
Slate can be found in various places such as on the sides of cliffs, underground, and in pits.
Slate normally is formed from a sedimentary rock.


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