Combining form of CALCAREOUS, used a. with adjectives, as calcareo-argillaceous (composed of clay with a mixture of lime), calcareo-magnesian, -sulphureous, etc.; also calcareo-coralligenous, producing a calcareous coral; b. with sbs. as calcareo-barite (see quot.)
1799. Kirwan, Geol. Ess., 127. Springs strongly impregnated with calcareous or calcareo-sulphureous matters.
1830. Lyell, Princ. Geol., I. 204. Calcareo-magnesian limestone.
1837. Dana, Min. (1868), 617. Calcareobarite is a white barite from Strontian containing … 6·6% of lime.
1845. Darwin, Voy. Nat., iv. (1852), 75. The grand calcareo argillaceous deposit.
1846. Dana, Zooph., vii. (1848), 113. Astræidæ, calcareo-coralligenous.
