Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio.
- coal beds or strata
- sedimentary Carboniferous rocks that include coal-bearing strata
Used by arrangement with John Wiley & Sons, Inc.
plural noun GeologyThe American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
- Coal Measures A stratigraphic unit equivalent to the Pennsylvanian or Upper Carboniferous Periods.
- Strata of the Carboniferous Period usually containing coal deposits.