Whitehead, Jason M; Bohaty, Steven M (2003): Diatom datums and abundance in ODP Hole 188-1165B and 188-1166A sediments. PANGAEA, https://doi.org/10.1594/PANGAEA.780459, Supplement to: Whitehead, JM; Bohaty, SM (2003): Data report: Quaternary-Pliocene diatom biostratigraphy of ODP Sites 1165 and 1166, Cooperation Sea and Prydz Bay. In: Cooper, AK; O'Brien, PE; Richter, C (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 188, 1-25, https://doi.org/10.2973/odp.proc.sr.188.008.2003
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The biostratigraphic distribution and qualitative relative abundance of Quaternary-Pliocene diatoms from Ocean Drilling Program Leg 188, Sites 1165 (64.380°S, 67.219°E) and 1166 (67.696°S, 74.787°E) offshore from East Antarctica, are documented in this report. The upper ~50 meters below seafloor (mbsf) of Hole 1165B consists of brown diatom-bearing silty clay spanning the upper Pleistocene to lower Pliocene. The diatom stratigraphy indicates a disconformity at ~17.1 mbsf of 0.5- to 0.6-m.y. duration. The integration of biostratigraphic and magnetostratigraphic data identified other disconformities at ~6.0, 14.4, 15.6, and 16.0 mbsf, but the duration of these hiatuses cannot be resolved through diatom biostratigraphy. In Hole 1166A, a narrow interval of diatomaceous Quaternary sediment is identified in the upper 2.92 mbsf and dated biostratigraphically at <0.38 Ma. The remaining Quaternary-Pliocene section is dominated by diamicton, except at ~114 mbsf, where two thin diatomaceous beds are present. The lower bed is ~65 cm thick, 2.5-2.7 to 2.7-3.2 Ma in age, and possibly disconformably overlain by the upper bed, which is ~15 cm thick and 1.8-2.0 to 2.1-2.5 Ma in age. The Pliocene assemblages in Hole 1166A contain components of both Southern Ocean and Antarctic continental shelf (Ross Sea) diatom floras.
Median Latitude: -65.374603 * Median Longitude: 69.489414 * South-bound Latitude: -67.696160 * West-bound Longitude: 67.219050 * North-bound Latitude: -64.379650 * East-bound Longitude: 74.786930
Date/Time Start: 2000-01-29T05:15:00 * Date/Time End: 2000-02-21T16:00:00
188-1165B * Latitude: -64.379650 * Longitude: 67.219050 * Date/Time Start: 2000-01-29T05:15:00 * Date/Time End: 2000-02-04T05:30:00 * Elevation: -3537.6 m * Penetration: 682.2 m * Recovery: 434.04 m * Location: Indian Ocean * Campaign: Leg188 * Basis: Joides Resolution * Device: Drilling/drill rig (DRILL) * Comment: 76 cores; 682.2 m cored; 0 m drilled; 63.6 % recovery
188-1166A * Latitude: -67.696160 * Longitude: 74.786930 * Date/Time Start: 2000-02-16T01:30:00 * Date/Time End: 2000-02-21T16:00:00 * Elevation: -475.4 m * Penetration: 381.3 m * Recovery: 71.31 m * Location: Prydz Bay * Campaign: Leg188 * Basis: Joides Resolution * Device: Drilling/drill rig (DRILL) * Comment: 40 cores; 381.3 m cored; 0 m drilled; 18.7 % recovery