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  • Petrology & Volcanology
  • Dr. James G. Moore
  • J Donnelly
  • J Heirtzler
  • R Ballard
  • Dr. James G. Moore
  • J Donnelly
  • J Heirtzler
  • R Ballard
  • North Atlantic Ocean
  • 1970s
  • NMNH - Mineral Sciences Dept.
  • Basalt glass
  • Glass
  • Basalt glass
  • Glass