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en.wikipedia.org/wiki/Slate

Slate is a fine-grained, foliated, homogeneous metamorphic rock derived from an original shale-type sedimentary rock composed of clay or volcanic ash through ...

geology.com/rocks/slate.shtml

Slate is a foliated metamorphic rock that forms from the metamorphism of shale.

flexiblelearning.auckland.ac.nz/rocks_minerals/rocks/slate.html

Slate is a low grade metamorphic rock generally formed by the metamorphosis of mudstone / shale, or sometimes basalt, under relatively low pressure and ...

www.amazon.com/Black-Gray-Slate-Metamorphic-Rock-Pieces/dp/B010GEMVXS

A fine-grained, layered metamorphic rock, Slate is derived from a shale-type of sedimentary rock composed of either clay or volcanic ash. Because low heat and  ...

www.pinterest.com/explore/slate-rock

Find and save ideas about Slate rock on Pinterest. | See more ideas about River rock patio, Painted stepping stones and Mosaic walkway.

www.britannica.com/science/slate-geology

slate: Fine-grained, clayey metamorphic rock that cleaves, or splits, readily into thin slabs having great tensile strength and durability; some other rocks that ...

sciencing.com/uses-slate-rock-6370420.html

Apr 25, 2017 ... Slate rock is used in the construction industry to make roofing shingles and coverings. Slate is preferred over artificial covering materials for its ...

www.michaels.com/gray-slate-rocks-by-ashland/10417942.html

Fill your glass bowls or decorative containers with these Gray Slate Rocks by Ashland™ to add some charm to your home decor. These stones also make great ...

sciencing.com/characteristics-slate-8199338.html

Apr 24, 2017 ... Slate is a naturally-occurring metamorphic rock. It is valued for its ability to break into thin plates. Slate is mostly found in the Western ...