Age datums, and abundance of Discoaster brouweri and Coccolithus pelagicus in ODP Site 180-1115 sediments

• Main Author: Siesser, William G
• Format: Dataset
• Language: English
• Published: PANGAEA 2001
• Subjects: 180-1115; COMPCORE; Composite Core; Joides Resolution; Leg180; Ocean Drilling Program; ODP; Solomon Sea; Antarctic; Antarc*
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.787036; https://doi.org/10.1594/PANGAEA.787036

The relative abundance of warm-water Discoaster brouweri vs. cool-water Coccolithus pelagicus provides a useful proxy for interpreting Pliocene surface water temperature trends at Ocean Drilling Program Site 1115 (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 ~3.2 Ma. The early and mid-Pliocene cool periods may reflect Antarctic glacial growth. A mid-Pliocene warm interval occurred from ~3.1 to 2.8 Ma. Temperature began to decline beginning ~2.7 Ma, marking the onset of Northern Hemisphere glaciation. This long-term decline in surface water temperature is interrupted by a brief warming event at ~2.3 Ma.