micaceous, a. Min.
(maɪˈkeɪʃɪəs)
[f. mica + -aceous.]
Containing or resembling mica; pertaining to or of the nature of mica, esp. in Combs. forming the descriptive names of various rocks, as micaceous lava, micaceous sandstone, micaceous schist, micaceous shale, micaceous slate.
| 1774 Pennant Tour Scotl. in 1772, 153 A micaceous slate, mixed with quartz. 1813 Sir H. Davy Agric. Chem. (1814) 193 Micaceous schistus, which is composed of quartz and mica arranged in layers. 1849 Dana Geol. ix. (1850) 463 Blue micaceous shale. 1882 Geikie Text-bk. Geol. ii. ii. iii, As this silvery lustre is..due to the presence of mica, it is commonly called distinctively micaceous. |