Seven Mn nodules ranging in size from 1x1x0.5 cm to 3x3x1 cm. One nodule has a distinct pattern of crevasses and ridges on its surface suggesting that it may be an internal cast.
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].