ppl. a. [UN-1 8.] Of rocks, etc.: Not exposed to, unaffected by, the action of the weather or atmosphere.
[1775. Ash.]
1837. Amer. Jrnl. Sci., XXXII. 235. On blasting to obtain unweathered specimens, the rock opened through several veins of Tabular Spar.
1843. Portlock, Geol., 527. The more compact variety [of rock], where unweathered, is distinctly porphyritic.
1860. Tyndall, Glac., II. xx. 338. In no case was he able to discover these fissures in the sound unweathered ice.
1884. Leisure Hour, Aug., 493/2. Extensive quarries from which fresh, unweathered material could be procured.
