~ 250 lbs. of basalt rock ranging in size from 1x2x2 to 1 ft x1 ft x2 ft. Rocks have a thin covering of volcanic glass on surface and some appear to have a columner structure.
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].