Dredge contained 40 lbs. of highly metamorphosed pieces of basalt. Sectioning with a same revealed that although the samples all appeared to be metamorphosed, there was a great deal of variation.
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].