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  1. The volcaniclastic sediments drilled from offshore Tahiti during Expedition 310 are variably altered.
  2. Unsurprisingly, the bulk composition of the least altered volcaniclastic sediments is similar to that of the volcanic and igneous rocks in Tahiti.
  3. The bulk of the volcaniclastic sediments was derived from the younger (≤1.3 Ma) alkalic to highly alkalic (<0.6 Ma) rock series in Tahiti.
  4. Age data suggest that there is no post-LGM lava flow in the Tiarei area.
  5. Total carbon and organic carbon contents are low in the deeper sections of the fine-grained volcaniclastic sediments drilled from offshore Tahiti.