Temperature fluctuations in Pliocene surface waters in the Woodlark Basin (Solomon Sea), based on calcareous nannofossils

Author(s): Siesser, William G.
Author Affiliation(s): Primary:
Vanderbilt University, Department of Geology, Nashville, TN, United States
Volume Title: Geological Society of America, 2001 annual meeting
Source: Abstracts with Programs - Geological Society of America, 33(6), p.20; Geological Society of America, 2001 annual meeting, Boston, MA, Nov. 1-10, 2001. Publisher: Geological Society of America (GSA), Boulder, CO, United States. ISSN: 0016-7592 CODEN: GAAPBC
Note: In English
Summary: Temperature-diagnostic nannofossil species have been used in an attempt to identify trends in surface-water changes in the Woodlark Basin during the Pliocene. The relative abundance of warm-water Discoaster brouweri compared to cool-water Coccolithus pelagicus is a useful proxy for interpreting Pliocene surface-water temperature trends at Ocean Drilling Program Site 1115 (Woodlark Basin in the Solomon Sea). Surface waters were mostly warm during the early Pliocene with a slightly cooler interval centered on 4.5 Ma. A more pronounced cool interval occurred at about 3.2 Ma. The early and middle Pliocene cool periods may reflect Antarctic glacial growth. A mid-Pliocene warm interval occurred from about 3.1 to 2.8 Ma, followed by a long-term decline in surface-water temperatures beginning about 2.7 Ma. This event probably correlates to the onset of Northern Hemisphere glaciation. Cooling continued to the end of the Pliocene, with a brief influx of warmer water appearing at about 2.3 Ma.
Year of Publication: 2001
Research Program: ODP Ocean Drilling Program
Key Words: 12 Stratigraphy, Historical Geology and Paleoecology; Algae; Cenozoic; Coccolithophoraceae; Coccolithus pelagicus; Coral Sea; Discoaster brouweri; Discoasteridae; Leg 180; Marine environment; Microfossils; Nannofossils; Neogene; ODP Site 1115; Ocean Drilling Program; Pacific Ocean; Paleo-oceanography; Paleoclimatology; Paleoecology; Paleotemperature; Plantae; Pliocene; Solomon Sea; South Pacific; Southwest Pacific; Tertiary; West Pacific; Woodlark Basin
Coordinates: S091123 S091123 E1513426 E1513426
Record ID: 2002011057
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States