Definition
Origin
Discoverer
Etymology
Class
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Group
Other Categories
It is a metamorphic magnesium rich rock because it is composed of the mineral talc
From 17th century, because of its greasy feel and use like a soap
Fine Grained Rock, Opaque Rock
Chalk is a soft, white, powdery limestone consisting mainly of fossil shells of foraminifers
From old English cealc chalk, lime, plaster; pebble, from Greek khalix small pebble, in English transferred to the opaque, white, soft limestone
Fine Grained Rock, Opaque Rock