wayboard
English
Alternative forms
- way-board
- way board
- weighboard
Noun
wayboard (plural wayboards)
- (geology, mining) A thin layer or band of rock that separates or defines the boundaries of thicker strata.
- 1905, Institution of Mining and Metallurgy (Great Britain), Transactions of the Institution of Mining & Metallurgy, volume 15, page 176:
- In the Mill Close Mine, a very rich and extensive flat occurred under a way-board which was topped with a tiny coal seam 1 in. thick or so, the way-board itself being from 1 to 3 ft. thick, and looking very much like an […]
This article is issued from Wiktionary. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.