HR: 1340h
AN: PP33B-0946    [Abstracts]
TI: High Resolution Calcareous Nannofossil Fluctuations Across the Oligocene/Miocene Boundary, ODP Hole 1168A
AU: * McGonigal, K L
EM: roessig@gly.fsu.edu
AF: Florida State University, 108 Carraway Building, Tallahassee, FL 32306 United States
AB: Ocean Drilling Program (ODP) Leg 189 drilled five sites around Tasmania to investigate the timing and nature of the development of the Tasmanian Seaway. The Oligocene/Miocene interval at Site 1168, located on the western continental slope of Tasmania, was relatively expanded with an average linear sedimentation rate of 5 cm/k.y. A high resolution study of calcareous nannofossils was conducted at a 5 k.y. sample interval. Fluctuations in nannofossil assemblages, diversity, absolute abundance and flux were calculated across the Oligocene/Miocene interval at Site 1168. These data were combined with physical property data to further elucidate changes across this interval. Multivariate statistical analysis was conducted on several time slices through the 2 m.y. interval of interest in an effort to identify paleoceanographic fluctuations.
DE: 9355 Pacific Ocean
DE: 9604 Cenozoic
DE: 3030 Micropaleontology
SC: Paleoceanography and Paleoclimatology [PP]
MN: 2004 AGU Fall Meeting