bn:23066689n
Noun Concept
Categories: Chalk, Webarchive template other archives, Articles with short description, Sewing equipment
EN
chalk  gypsum  black chalk  chalk rock  chalkstone
EN
Chalk is a soft, white, porous, sedimentary carbonate rock. Wikipedia
English:
rock
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EN
Chalk is a soft, white, porous, sedimentary carbonate rock. Wikipedia
Type of sedimentary rock, composed predominantly of calcium carbonate. Wikipedia Disambiguation
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