Composed of sand, silt, colloidal size material and organic debris. The organics include worn and weathered fragments of Bryozoans, worm tubes, pelecypods, gastropods.
Cite the IMLGS database as: Curators of Marine and Lacustrine Geological Samples Consortium. The Index to Marine and Lacustrine Geological Samples (IMLGS). National Geophysical Data Center, NOAA. doi:10.7289/V5H41PB8 [date of access].