Calcareous

of, containing, or like calcium carbonate; chalky:
calcareous earth.
Historical Examples

A Busy Year at the Old Squire’s Charles Asbury Stephens
The Wonder Island Boys: The Tribesmen Roger Finlay
Scenes and Adventures in the Semi-Alpine Region of the Ozark Mountains of Missouri and Arkansas Henry Rowe Schoolcraft
The Sea Shore William S. Furneaux
The Principles of Stratigraphical Geology J. E. Marr
A Dictionary of Arts, Manufactures and Mines Andrew Ure
Encyclopaedia Britannica, 11th Edition, Volume 17, Slice 3 Various
Grasses H. Marshall Ward
Cooley’s Cyclopdia of Practical Receipts and Collateral Information in the Arts, Manufactures, Professions, and Trades…, Sixth Edition, Volume I Arnold Cooley
The Sea-beach at Ebb-tide Augusta Foote Arnold

adjective
of, containing, or resembling calcium carbonate; chalky
adj.
calcareous
(kāl-kâr’ē-əs)
Composed of or containing calcium or calcium carbonate. Calcareous rocks contain as much as 50 percent calcium carbonate.