Chalk (pronunciation: /ˈtʃɔːk/) is a soft, white, porous sedimentary carbonate rock, a form of limestone composed of the mineral calcite.
Showing posts with label Chalk (pronunciation: /ˈtʃɔːk/) is a soft white porous sedimentary carbonate rock a form of limestone composed of the mineral calcite.. Show all posts
Showing posts with label Chalk (pronunciation: /ˈtʃɔːk/) is a soft white porous sedimentary carbonate rock a form of limestone composed of the mineral calcite.. Show all posts
Subscribe to:
Posts (Atom)