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doi:10.2204/iodp.proc.330.201.2014 Data report: calcareous nannofossil biostratigraphy of Expedition 330, Louisville Seamount Trail, Sites U1372–U13771Johnathon P. Kell2 and David K. Watkins3AbstractSix sites were drilled along the Louisville Seamount Trail during Integrated Ocean Drilling Program (IODP) Expedition 330. Pelagic sediments were recovered at four of the six sites, although calcareous nannofossils are observed at all sites. Sediments recovered at Site U1372 are Pliocene to Pleistocene in age. At Site U1373, only a small amount of disturbed pelagic sediment was recovered from the core catcher and was found to be early Pleistocene in age. Site U1374 has an early Pleistocene pelagic cap overlying older rocks, including sandstone that contains nannofossils from the late Maastrichtian (latest Cretaceous). Site U1375 contains indurated sediments that are early Paleocene in age, with the overlying pelagic sediments of Pliocene to Pleistocene age. Three distinct chalks were recovered at Site U1376. Each chalk had a unique assemblage of flora: Sample 330-U1376A-1R-1, 1 cm, contains a mixed Neogene assemblage, the chalk of Sample 1R-1, 41 cm, contains a late Miocene assemblage, and chalk from Sample 1R-1, 76 cm, contains an assemblage of flora indicating an early to middle Miocene age that includes Sphenolithus heteromorphus. Only a small amount of disturbed sediment was recovered within the core catcher of Hole U1377A. The mixed assemblage within this sample is Pleistocene in age. In Hole U1377B, Sample 330-U1377B-1R-2, 0–1 cm, contains a middle Eocene assemblage that includes Discoaster barbadiensis, Discoaster binodosus, Discoaster saipanensis, Ericsonia formosa, and Chiasmolithus grandis. |
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