James St. John:
"Greek Green Porphyry" (glomeroporphyritic metabasalt) (Tyros Beds, Triassic; near Levetsova, Laconia, Greece) 1
James St. John:
"Greek Green Porphyry" (glomeroporphyritic metabasalt) (Tyros Beds, Triassic; near Levetsova, Laconia, Greece) 2