Subrounded to rounded pebbles (calcareous encrusted) are present as well as a collection of clayey, manganese nodular type concretions: calcareous bryozoa, pink coral, glassy quartz.
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].