12PK Raw Limestone Chalk, Sedimentary Rock Specimens - Approx. 1" - Ge — Eisco Labs
Limestone (chalk) -model material of a carbonate oil reservoir | Download Scientific Diagram
Limestone is a type of sedimentary rock that is mainly made up of a substance called calcium carbonate. Calcium carbonate has the chemical formula, CaCO3. - ppt download
Chalk - Wikipedia
DISCOVERING FOSSILS | What is chalk and how does it form?
GCSE Geography | Limestone and Chalk Features in a Landscape
Chalk: A biological limestone formed from shell debris