Ultramafic and Basaltic Rocks Dredged from the Nearshore Flank of the Tonga Trench Fisher, Robert L. ; Engel, Celeste G. Abstract Publication: Geological Society of America Bulletin Pub Date: 1969 DOI: 10.1130/0016-7606(1969)80[1373:UABRDF]2.0.CO;2 Bibcode: 1969GSAB...80.1373F