Hovan, Steven A; Rea, David K (1992): (Table 1) Stable-isotope and eolian grain size data across the Paleocene/Eocene boundary from DSDP Hole 22-215 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.711817
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Abstract:
Deep Sea Drilling Project (DSDP) Site 215 provides an expanded section across the Paleocene/Eocene boundary, the most complete mid-latitude sequence from a Southern Hemisphere location in the Indo-Pacific area. The events of this transition occurred during a span of about 1.2 m.y. Oxygen isotope values derived from benthic foraminiferal calcite decrease by about 1.0 per mil, a decrease most likely related to warming of deep ocean waters. Turnovers of benthic foraminifera accompany d18O changes and culminate in the predominant extinction event at the end of the Paleocene Epoch. Carbon isotope ratios also shift dramatically toward lighter values near the end of the Paleocene, beginning about 0.45 m.y. after oxygen isotope values start to change. The intensity of Southern Hemisphere atmospheric circulation as recorded by grain sizes of eolian particles shows a large and rapid reduction beginning another 0.45 m.y. later. A significant reduction of zonal wind strength at the Paleocene/Eocene boundary, until now observed only at Northern Hemisphere locations, appears to have been a global phenomenon related to decreased latitudinal thermal gradients occasioned by more effective poleward heat transport via the deep ocean.
Related to:
Hovan, Steven A; Rea, David K (1992): Paleocene/Eocene boundary changes in atmospheric and oceanic circulation: A Southern Hemisphere record. Geology, 20(1), 15-18, https://doi.org/10.1130/0091-7613(1992)020%3C0015:PEBCIA%3E2.3.CO;2
Project(s):
Deep Sea Drilling Project (DSDP)
Coverage:
Latitude: -8.121700 * Longitude: 86.791700
Date/Time Start: 1972-02-13T00:00:00 * Date/Time End: 1972-02-13T00:00:00
Minimum DEPTH, sediment/rock: 84.83 m * Maximum DEPTH, sediment/rock: 129.95 m
Event(s):
22-215 * Latitude: -8.121700 * Longitude: 86.791700 * Date/Time: 1972-02-13T00:00:00 * Elevation: -5309.0 m * Penetration: 175 m * Recovery: 116 m * Location: Indian Ocean//BASIN * Campaign: Leg22 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 20 cores; 175 m cored; 0 m drilled; 66.3 % recovery
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | DEPTH, sediment/rock | Depth sed | m | Geocode | ||
| 2 | Sample code/label | Sample label | Hovan, Steven A | DSDP/ODP/IODP sample designation | ||
| 3 | Median, grain size | D50 | phi | Hovan, Steven A | ||
| 4 | Nuttallides truempyi, δ18O | N. truempyi δ18O | ‰ PDB | Hovan, Steven A | ||
| 5 | Nuttallides truempyi, δ13C | N. truempyi δ13C | ‰ PDB | Hovan, Steven A | ||
| 6 | δ13C, carbonate | δ13C carb | ‰ PDB | Hovan, Steven A | ||
| 7 | Sample comment | Sample comment | Hovan, Steven A |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
121 data points