from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A fine-grained rock of consolidated silt.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A sedimentary rock whose composition is intermediate in grain size between the coarser sandstone and the finer mudstone.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a fine-grained sandstone of consolidated silt
Sorry, no etymologies found.