Ocean Drilling Program Leg 189 Sedimentary Core Data
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Description
Ocean Drilling Program Leg 189 recovered 4539 meters of marine core from five sites in the Tasmanian Gateway with an 89% recovery rate. The cores provide a continuous sedimentary record from the upper Maastrichtian to the Holocene, used to study the opening of the gateway and its climatic effects. The data includes microfossil evidence like palynomorphs, diatoms, nannofossils, and foraminifers across mudstone, siltstone, and carbonate sequences.
Use Cases
Analyze microfossil assemblages (palynomorphs, diatoms, nannofossils, foraminifers) to reconstruct paleoclimatic conditions across the Eocene/Oligocene boundary.
Correlate sedimentary sequences (mudstones, siltstones, carbonates) from five drilling sites to map the timing of the Tasmanian Gateway opening.
Use the 4539-meter core record to model changes in siliciclastic versus carbonate deposition linked to Antarctic Circumpolar Current formation.
Investigate the unconformity and condensed glauconitic siltstone layers as proxies for current activity and subsidence events near ~37 Ma.
Strengths
4539 meters of largely continuous core material provides a high-resolution geological record.
Data spans a critical climatic transition period from the upper Maastrichtian to the Holocene.
Cores from five distinct bathyal sites allow for spatial analysis across the Tasmanian Gateway.
Limitations
Data is presented in HTML format, not a structured, machine-readable table, complicating quantitative analysis.
Specific column names, row counts, and sample data are unavailable, limiting immediate analytical use.
The dataset is a synthesis publication; raw core measurement data may require extraction from the text.
Provenance
Source
Geoscience Australia Data, originating from the Ocean Drilling Program (ODP) Leg 189.
Collection Method
Marine sediment cores drilled from five sites in bathyal depths on submerged continental blocks.
Time Range
Upper Maastrichtian to Holocene (Late Cretaceous to present).
Freshness
Last updated 2026-03 07.
Geography
Tasmanian Gateway, submerged continental blocks between Australia and Antarctica.
Primary data is embedded in an HTML publication; users must parse text to extract structured geological and paleontological information. License is not specified.