primary stratigraphic trap
primary stratigraphic trap
[′prī‚mer·ē ¦strad·ə¦graf·ik ′trap] (geology)
A stratigraphic trap formed by the deposition of clastic materials (such as shoestring sands, lenses, sand patches, bars, or cocinas) or through chemical deposition (such as organic reefs or biostromes).
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.