calliard local.
(ˈkælɪəd)
[Of doubtful origin; perh. connected with F. caillou pebble, and so ultimately with L. calculus. But cf. the later galliard n.2]
A hard, smooth, flinty gritstone.
| 1781 J. Hutton Tour to Caves (ed. 2) Gloss. (1873), Callierd, an hard stone. a 1835 J. Phillips Geol. in Encycl. Metrop. (1845) VI. 587/2 Some less regular sandstone beds, called ‘Cankstone’, approach very nearly to the nature of the ganister or calliard rocks of the coal strata. 1865 Page Handbk. Geol. Terms, Calliard.., a local name for any hard siliceous stone; often applied by English miners and quarrymen to beds of cherty or siliceous limestone. 1876 Woodward Geol. Eng. & Wales 81 Some of the beds contain gritstone or greywacke, provincially called ‘calliard’. |