† hornslate Min. Obs.
(ˈhɔːnsleɪt)
[Cf. Ger. hornschiefer.]
A schistous form of hornstone.
| 1791 Beddoes in Phil. Trans. LXXXI. 60 The Scheibenberg, near Königsbruck, consists of a stone which Mr. Leske knows not whether to call hornslate, or corneous porphyry. 1796 Kirwan Elem. Min. (ed. 2) I. 307 Horn⁓slate..Schistose Porphyry of Werner. 1799 W. Tooke View Russian Emp. I. 116 Pebbles of hornslate. |