trappean

/ trəˈpɪən; ˈtræpɪən /

adjective

1. rare.
   of, relating to, or consisting of igneous rock, esp a basalt

Word History and Origins

Origin of trappean¹

C19: from trap ³

Example Sentences

What is the difference between trappean breccia and trappean conglomerate?

From Project Gutenberg

Dark trappean rocks full of hornblende have in many places burst through these schists, and appear in nodules on the surface.

From Project Gutenberg

The igneous rocks will be described under the various groups of Granitic, Trappean, and Volcanic.

From Project Gutenberg

Argillaceous rocks, like all others, are subject to metamorphism when they come in contact with eruptive trappean rocks.

From Project Gutenberg

They never repose on the volcanic or trappean formations, nor on strata containing organic remains.

From Project Gutenberg