Trap-rock
1Trap rock — is a form of plutonic igneous rock that tends to form polygonal vertical fractures, most typically hexagonal, but also four to eight sided. The fracture pattern forms when magma of suitable chemical composition (typically basaltic) intrudes as a… …
2trap rock — Trap Trap, n. [Sw. trapp; akin to trappa stairs, Dan. trappe, G. treppe, D. trap; so called because the rocks of this class often occur in large, tabular masses, rising above one another, like steps. See {Tramp}.] (Geol.) An old term rather… …
3trap|rock — «TRAP ROK», noun. = trap3. (Cf. ↑trap) …
4trap rock — n. TRAP2 * * * …
5trap rock — n. TRAP2 …
6Trap — Trap, n. [Sw. trapp; akin to trappa stairs, Dan. trappe, G. treppe, D. trap; so called because the rocks of this class often occur in large, tabular masses, rising above one another, like steps. See {Tramp}.] (Geol.) An old term rather loosely… …
7Trap tufa — Trap Trap, n. [Sw. trapp; akin to trappa stairs, Dan. trappe, G. treppe, D. trap; so called because the rocks of this class often occur in large, tabular masses, rising above one another, like steps. See {Tramp}.] (Geol.) An old term rather… …
8Trap tuff — Trap Trap, n. [Sw. trapp; akin to trappa stairs, Dan. trappe, G. treppe, D. trap; so called because the rocks of this class often occur in large, tabular masses, rising above one another, like steps. See {Tramp}.] (Geol.) An old term rather… …
9Trap — Trap, a. Of or pertaining to trap rock; as, a trap dike. [1913 Webster] …
10trap — 1. n. & v. n. 1 a an enclosure or device, often baited, for catching animals, usu. by affording a way in but not a way out. b a device with bait for killing vermin, esp. = MOUSETRAP. 2 a trick betraying a person into speech or an act (is this… …
