Massive basalt lavas, bombs. Welded tuff or perhaps hot mud flow. Chert with calcareous and manganese crust. Plus some highly weathered basalts. Basalts have manganese crust on one side.
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].