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Chalk is a fine-textured, earthy type of limestone distinguished by its light colour, softness, and high porosity. [1] [2] It is composed mostly of tiny fragments of the calcite shells or skeletons of plankton, such as foraminifera or coccolithophores. [1]
CHALK definition: 1. a type of soft white rock 2. a stick of this rock or a similar substance used for writing or…. Learn more.
Oct 10, 2023 · Chalk. Modified date: 11/10/2023. Chalk is a soft, white, porous, sedimentary rock composed primarily of the mineral calcite (calcium carbonate). It is often associated with marine environments and is characterized by its distinctive white color and powdery texture.
The meaning of CHALK is a soft white, gray, or buff limestone composed chiefly of the shells of foraminifers. How to use chalk in a sentence.
Auth | Chalk. I forgot my password! Or log in using. Download Planboard for iOS and Android. " Don’t just teach your kids to read, teach them to question what they read. Teach them to question everything!
Jun 13, 2024 · chalk, soft, fine-grained, easily pulverized, white-to-grayish variety of limestone. Chalk is composed of the shells of such minute marine organisms as foraminifera, coccoliths, and rhabdoliths. The purest varieties contain up to 99 percent calcium carbonate in the form of the mineral calcite.
Diamonds: Learn about the properties of diamond, its many uses, and diamond discoveries. Chalk is a biological limestone derived from the tiny calcium carbonate shells of foraminifera and the calcareous remains of marine algae. It is soft, friable, porous, permeable and usually white to light gray in color.
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