Min. [See quot. 1862; mod.F. has also calp.] Local name of a species of dark-grey limestone occurring in Central Ireland.
1784. Kirwan, Min. (ed. 2), I. 233. Calp, or black quarry stone of Dublin. Colour, bluish black, or dark greyish blue, variously intersected with veins of white calcareous spar, and often invested with the same.
1803. Ann. Rev., I. 872/2. The calp quarries are situated in the neighbourhood of Lucan.
1862. Jukes, Stud. Man. Geol., 512. This … has been called Calp from a local term signifying black shale.
