Home > Term: black chalk
black chalk
A bluish-black carbonaceous clay, shale, or slate, used as a pigment or crayon.
- Part of Speech: noun
- Industry/Domain: Mining
- Category: General mining; Mineral mining
- Government Agency: USBM
0
Creator
- ed.young
-
(V.I.P) 21084 points - 100% positive feedback
(Milwaukee, United States)
