Definition of "mica-slate" [mica-slate]

• The common name of the rock now usually designated by lithologists as mica-schist. (noun)

The Century Dictionary (Public Domain)

• "Zagázig; and Anton, the dragoman, triumphantly bore away fragments bristling with mica-slate, whose glitter he fondly conceived to be silver."
• "Looking to its earliest origin, the red granite seems to have been injected on an ancient pre-existing line of white granite and mica-slate."
• "The granite was capped with mica-slate, and this in the lapse of ages had been worn into strange finger-shaped points."