5 fragments of moderately weathered manganese crust which are botryoidal on one surfaces and clinkery on the opposite surface. The fragments are about 10 cm in diameter and 2 cm thick. No fresh surfaces are evident.
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].