Chalk (disambiguation)
Chalk is a type of sedimentary rock, composed predominantly of calcium carbonate. Chalk may also refer to: The Chalk Group, a stratigraphic unit in northwest Europe.
Chalk is a type of sedimentary rock, composed predominantly of calcium carbonate. Chalk may also refer to: The Chalk Group, a stratigraphic unit in northwest Europe.
Chalk is a type of sedimentary rock, composed predominantly of calcium carbonate. Chalk may also refer to: The Chalk Group, a stratigraphic unit in northwest Europe.
Source: Wikipedia "Chalk (disambiguation)" · CC BY-SA 4.0
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