Slate is a fine-grained, metamorphic rock that shows no obvious compositional layering but can easily be split … See more

Before the mid-19th century, the terms "slate", "shale", and "schist" were not sharply distinguished. In the context of underground coal mining in the United States, the term slate was commonly used to refer to s… See more

Slate can be made into roofing slate, a type of roof tile which are installed by a slater. Slate has two lines of breakability—cleavage and grain—which make it possible to split the stone into thin sheets. Wh… See more

Slate is found in the Arctic and was used by Inuit to make the blades for ulus. China has vast slate deposits; in recent years its export of finished and unfinished slate has increased. Deposits of slate exist throughout … See more

• Bluestone in South Australia, a form of slate used extensively in Adelaide 1850s–1920s See more

• Page, William (ed.) (1906). The Victoria History of the County of Cornwall; vol. I. (Chapter on quarries.) Westminster: Constable.
• Hudson, Kenneth (1972). Building Materials; "Chapter 2: Stone and Slate". pp L… See more