Trap 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 loosely used to designate various dark-colored, heavy igneous rocks, including especially the feldspathic-augitic rocks, basalt, dolerite, amygdaloid, etc., but including also some kinds of diorite. Called also {trap rock}. [1913 Webster]

{Trap tufa}, {Trap tuff}, a kind of fragmental rock made up of fragments and earthy materials from trap rocks. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • trap-tuff — n. See trap tufa …   New dictionary of synonyms

  • 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 loosely… …   The Collaborative International Dictionary of English

  • trap 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… …   The Collaborative International Dictionary of English

  • Trap 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… …   The Collaborative International Dictionary of English

  • trap-tufa — n.; (also trap tuff) (Geol.) Volcanic tuff, volcanic grit …   New dictionary of synonyms

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