Sato, Tokiyuki; Saito, Takato; Yuguchi, Shiho; Nakagawa, Hiroshi; Kameo, Koji; Takayama, Toshiaki (2002): Calcareous nannofossil events of DSDP Hole 31-292 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.706116, Supplement to: Sato, T et al. (2002): Late Pliocene calcareous nannofossil paleobiogeography of the Pacific Ocean: evidence for glaciation at 2.75 Ma. Revista Mexicana de Ciencias Geológica, 19(3), 175-189, http://www.rmcg.unam.mx/index.php/rmcg/article/view/964
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Abstract:
Calcareous nannofossil assemblages from land sections of the Japanese Islands and DSDP Holes in the equatorial to high latitude regions of the Pacific Ocean were analyzed in an effort to reconstruct their late Pliocene paleobiogeography. While the late Pliocene assemblages in the equatorial to middle latitude regions are comprised primarily of discoasters, both the high latitude and Japan Sea samples record an abrupt change from a Reticulofenestra-Dictyococcite assemblage to a Coccolithus pelagicus assemblage at 2.75 Ma. The northernmost boundary of the Discoaster assemblage moved southward in the East China Sea (western Pacific Ocean) at that time. These changes in the calcareous nannofossil paleobiogeography indicate the strong influence of heavy glaciation in high latitude to arctic regions of the Pacific Ocean. This also correlates with the final closure of the Central American seaway at 2.75 Ma.
Project(s):
Deep Sea Drilling Project (DSDP)
Coverage:
Latitude: 15.818500 * Longitude: 124.650800
Date/Time Start: 1973-06-26T00:00:00 * Date/Time End: 1973-06-26T00:00:00
Minimum DEPTH, sediment/rock: 2.80 m * Maximum DEPTH, sediment/rock: 31.55 m
Event(s):
31-292 * Latitude: 15.818500 * Longitude: 124.650800 * Date/Time: 1973-06-26T00:00:00 * Elevation: -2943.0 m * Penetration: 443.5 m * Recovery: 242.8 m * Location: North Pacific/Philippine Sea/CONT RISE * Campaign: Leg31 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 46 cores; 434 m cored; 9.5 m drilled; 56 % recovery
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | DEPTH, sediment/rock | Depth sed | m | Geocode | ||
| 2 | Depth, top/min | Depth top | m | Sato, Tokiyuki | ||
| 3 | Depth, bottom/max | Depth bot | m | Sato, Tokiyuki | ||
| 4 | Ageprofile Datum Description | Ageprof dat des | Sato, Tokiyuki | |||
| 5 | Age model | Age model | ka | Sato, Tokiyuki | Age model, GPTS (geomagnetic polarity timescale), Cande and Kent (1995) | ages Cande and Kent (1995), Sato et al. (1999) |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
60 data points
Data
| 1 Depth sed [m] | 2 Depth top [m] | 3 Depth bot [m] | 4 Ageprof dat des | 5 Age model [ka] |
|---|---|---|---|---|
| 2.80 | 2.7 | 2.9 | LO Helicosphaera inversa | 160 |
| 3.30 | 3.2 | 3.4 | FO Emiliania huxleyi | 250 |
| 4.10 | 4.0 | 4.2 | LO Pseudoemiliania lacunosa | 410 |
| 8.90 | 8.8 | 9.0 | FO Helicosphaera inversa | 510 |
| 9.10 | 9.0 | 9.2 | LO Reticulofenestra asanoi | 850 |
| 9.80 | 9.7 | 9.9 | FO Gephyrocapsa parallela | 950 |
| 10.20 | 10.1 | 10.3 | LO Gephyrocapsa caribbeanica (large) | 1210 |
| 10.95 | 10.9 | 11.0 | FO Gephyrocapsa caribbeanica (large) | 1450 |
| 14.35 | 11.0 | 17.7 | LO Discoaster brouweri | 1970 |
| 14.35 | 11.0 | 17.7 | LO Discoaster triradiatus | 1970 |
| 14.35 | 11.0 | 17.7 | LO Discoaster spp. | 1970 |
| 19.50 | 19.4 | 19.6 | LO Discoaster pentaradiatus | 2380 |
| 20.30 | 20.2 | 20.4 | LO Discoaster surculus | 2540 |
| 20.80 | 20.7 | 20.9 | LO Discoaster tamalis | 2740 |
| 31.55 | 31.4 | 31.7 | LO Reticulofenestra pseudoumbilicus | 3850 |