Obsidian Intrusive or Extrusive
Conglomerate
Granite Intrusive or Extrusive
Granite
Chalk
Basalt
Shale
Sandstone
Pegmatite Intrusive or Extrusive
Pumice
Coquina Limestone
Porphyry Intrusive or Extrusive
Breccia
Pegmatite
Porphyry
Bituminous Coal
Gabbro Intrusive or Extrusive
Scoria
Scoria Intrusive or Extrusive
Basalt Intrusive or Extrusive
Obsidian
Pumice Intrusive or Extrusive
Gabbro
