Basalt: pl phyric basalt-some as discreet pieces and some as dykes cutting gabbro. ~100 lbs. Gabbro: fine to coarse grained gabbro of which ~20% is metamorphosed to amphibolite.
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].