Manganese nodules with about 2 lbs of small rock pebbles. Mn nodules were generally elongate aggregates of 1-2 cm spherules with overall dimensions roughly 3x5x7 cm.
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].