Mixed terrigenous and pelagic sediment of Eocene age was recovered from the deep-sea floor 250 km east of Hawaii. These samples indicate Eocene terrigenous sedimentation from a well-developed ridge source and imply a post-Eocene development of the Hawaiian Moat as a sediment trap. Another core that also contained Eocene sediment, mixed however, with Oligocene and Miocene materials, was obtained from the flank of the Hawaiian Ridge, 100 km south of Kauai.

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