Deep Sea Drilling Project Leg 21 recovered Cenozoic and latest Cretaceous sediments at Site 208 on the Lord Howe Rise. The dataset provides new biostratigraphic, magnetostratigraphic, and geochemical data from cores at depths of 540-590 meters below seafloor to constrain stratigraphy around the K/Pg boundary. The data was published in GSA Bulletin in 2021.
Use Cases
- Calibrating the K/Pg boundary location based on biostratigraphic data on calcareous nannofossils.
- Analyzing global carbon cycle perturbations using the negative shift in carbonate carbon isotopic composition (δ13Ccarb).
- Identifying the bolide impact signal using osmium concentration and Os isotopic composition (187Os/188Os) data.
- Assessing sediment deposition continuity across the K/Pg boundary interval in a deep-sea environment.
Strengths
- Integrates multiple data types: biostratigraphic, magnetostratigraphic, and geochemical.
- Provides depth-specific data points between 540-590 meters below seafloor.
- Includes concrete geochemical measurements like osmium isotopic values of 0.12-0.16.
Limitations
- Row count is unknown, which may limit suitability assessment.
- Column-level documentation is absent; field semantics must be inferred after download.
- The description suggests the sedimentary record across the K/Pg boundary may not be completely continuous.
Provenance
- Source
- Australian Ocean Data Network, citing research published in GSA Bulletin.
- Collection Method
- Data gathered from cores recovered during Deep Sea Drilling Project Leg 21 at Site 208.
- Time Range
- Late Cretaceous (Maastrichtian) to Paleocene (Danian and Selandian).
- Freshness
- Last updated 2026-06-23 04:16:53.875716; freshness should be verified.
- Geography
- Lord Howe Rise, Southwest Pacific.