trappean

About 0.01 uses per million words.

Meaning

1. adjective Of or pertaining to trap; of the nature of trap.
2. adjective Relating to or composed of basalt or other igneous rock.

Similar words

trappous trappose trappist trapezohedral trapezial trachydoleritic trespassory trachytic trachybasaltic trachyphonolitic

Often followed by

rocks and beds rock formations porphyries masses or ridge series