sedimentary rock

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun geology one of the major groups of rock that makes up the crust of the Earth; formed by the deposition of either the weathered remains of other rocks, the results of biological activity, or precipitation from solution

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun rock formed from consolidated clay sediments