Lozar, Francesca; Mussa, Massimo (2003): (Table 1) Silicoflagellate abundance in ODP Hole 186-1149A sediments [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.783924, Supplement to: Lozar, F; Mussa, M (2003): Silicoflagellate biostratigraphy, Hole 1149A (ODP Leg 185, Nadezhda Basin, northwestern Pacific). In: Ludden, JN; Plank, T; Escutia, C (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 185, 1-18, https://doi.org/10.2973/odp.proc.sr.185.009.2003
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Abstract:
Silicoflagellate assemblages have been studied from Hole 1149A (northwestern Pacific, Ocean Drilling Program Leg 185) in a continuous record of pelagic clay from lithologic Unit I. The biostratigraphic framework of D. Bukry, adapted in this work, is calibrated to tropical and subtropical fossil floras. Four biozones and three subzones have been recognized (from the lower Pliocene Dictyocha fibula Zone to the Quaternary Dictyocha aculeata aculeata Zone), and their zonal boundaries have been calibrated to the magnetostratigraphic scale. In particular, the boundary between the Dictyocha perlaevis delicata and the Dictyocha perlaevis ornata Subzones approximates the Pliocene/Pleistocene boundary.
The identification of three closely spaced climatic events (the asperoid/fibuloid reversal at 75.11 meters below seafloor [mbsf], the sharp decrease in abundance of Distephanus sp. at 70.05 mbsf, and the last occurrence of Distephanus boliviensis at 68.46 mbsf) indicates the increased strength of the warm Kuroshio Current in the interval between 3.3 and 2.8 Ma, due to the final closure of the Central American Seaway and leading to the present-day hydrodynamic regime. The beginning of the acme of Mesocena quadrangula at 37.01 mbsf (~1.1 Ma) also shows a sharp warming in surface waters.
Related to:
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Latitude: 31.342000 * Longitude: 143.351300
Date/Time Start: 1999-05-23T15:00:00 * Date/Time End: 1999-05-26T07:25:00
Minimum DEPTH, sediment/rock: 1.12 m * Maximum DEPTH, sediment/rock: 98.60 m
Event(s):
185-1149A * Latitude: 31.342000 * Longitude: 143.351300 * Date/Time Start: 1999-05-23T15:00:00 * Date/Time End: 1999-05-26T07:25:00 * Elevation: -5817.6 m * Penetration: 191.2 m * Recovery: 174.44 m * Location: North Pacific Ocean * Campaign: Leg185 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 23 cores; 191.2 m cored; 0 m drilled; 91.2 % recovery
Comment:
Sediment depth is given in mbsf. Sample observation was performed under a polarizing light microscope at 400x magnification. Abundance estimate as follows: A = abundant, C = common, F = few, R = rare, VR = very rare, - not found.
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Sample code/label | Sample label | Lozar, Francesca | DSDP/ODP/IODP sample designation | ||
| 2 | DEPTH, sediment/rock | Depth sed | m | Geocode | ||
| 3 | Organic matter | OM | Lozar, Francesca | |||
| 4 | Biogenic | Biogenic | Lozar, Francesca | |||
| 5 | Volcanic glass | Volc glass | Lozar, Francesca | N = absent, S = present (<15% of fine fraction), A = abundant (>15% of fine fraction) | ||
| 6 | Corbisema triacantha | C. triacantha | Lozar, Francesca | Abundance estimate, Baccelle and Bosellini (1965) | ||
| 7 | Dictyocha aculeata aculeata | D. aculeata aculeata | Lozar, Francesca | Abundance estimate, Baccelle and Bosellini (1965) | ||
| 8 | Dictyocha aculeata subaculeata | D. aculeata subaculeata | Lozar, Francesca | Abundance estimate, Baccelle and Bosellini (1965) | ||
| 9 | Dictyocha aspera aspera | D. aspera aspera | Lozar, Francesca | Abundance estimate, Baccelle and Bosellini (1965) | ||
| 10 | Dictyocha brevispina ausonia | D. brevispina ausonia | Lozar, Francesca | Abundance estimate, Baccelle and Bosellini (1965) | ||
| 11 | Dictyocha brevispina brevispina | D. brevispina brevispina | Lozar, Francesca | Abundance estimate, Baccelle and Bosellini (1965) | ||
| 12 | Dictyocha calida ampliata | D. calida ampliata | Lozar, Francesca | Abundance estimate, Baccelle and Bosellini (1965) | ||
| 13 | Dictyocha calida calida | D. calida calida | Lozar, Francesca | Abundance estimate, Baccelle and Bosellini (1965) | ||
| 14 | Dictyocha fibula | D. fibula | Lozar, Francesca | Abundance estimate, Baccelle and Bosellini (1965) | ||
| 15 | Dictyocha lingii | D. lingii | Lozar, Francesca | Abundance estimate, Baccelle and Bosellini (1965) | ||
| 16 | Dictyocha longa | D. longa | Lozar, Francesca | Abundance estimate, Baccelle and Bosellini (1965) | ||
| 17 | Dictyocha pentagona | D. pentagona | Lozar, Francesca | Abundance estimate, Baccelle and Bosellini (1965) | ||
| 18 | Dictyocha perlaevis delicata | D. perlaevis delicata | Lozar, Francesca | Abundance estimate, Baccelle and Bosellini (1965) | ||
| 19 | Dictyocha perlaevis flexatella | D. perlaevis flexatella | Lozar, Francesca | Abundance estimate, Baccelle and Bosellini (1965) | ||
| 20 | Dictyocha perlaevis ornata | D. perlaevis ornata | Lozar, Francesca | Abundance estimate, Baccelle and Bosellini (1965) | ||
| 21 | Dictyocha perlaevis perlaevis | D. perlaevis perlaevis | Lozar, Francesca | Abundance estimate, Baccelle and Bosellini (1965) | ||
| 22 | Dictyocha pulchella | D. pulchella | Lozar, Francesca | Abundance estimate, Baccelle and Bosellini (1965) | ||
| 23 | Dictyocha stapedia aspinosa | D. stapedia aspinosa | Lozar, Francesca | Abundance estimate, Baccelle and Bosellini (1965) | ||
| 24 | Dictyocha stapedia stapedia | D. stapedia stapedia | Lozar, Francesca | Abundance estimate, Baccelle and Bosellini (1965) | ||
| 25 | Distephanus boliviensis | D. boliviensis | Lozar, Francesca | Abundance estimate, Baccelle and Bosellini (1965) | ||
| 26 | Distephanus crux | D. crux | Lozar, Francesca | Abundance estimate, Baccelle and Bosellini (1965) | s.l. | |
| 27 | Distephanus octangulatus | D. octangulatus | Lozar, Francesca | Abundance estimate, Baccelle and Bosellini (1965) | ||
| 28 | Distephanus speculum minutus | D. speculum minutus | Lozar, Francesca | Abundance estimate, Baccelle and Bosellini (1965) | ||
| 29 | Distephanus speculum pentagonus | D. speculum pentagonus | Lozar, Francesca | Abundance estimate, Baccelle and Bosellini (1965) | ||
| 30 | Distephanus speculum speculum | D. speculum speculum | Lozar, Francesca | Abundance estimate, Baccelle and Bosellini (1965) | ||
| 31 | Mesocena circulus | M. circulus | Lozar, Francesca | Abundance estimate, Baccelle and Bosellini (1965) | ||
| 32 | Mesocena elliptica | M. elliptica | Lozar, Francesca | Abundance estimate, Baccelle and Bosellini (1965) | ||
| 33 | Mesocena quadrangula | M. quadrangula | Lozar, Francesca | Abundance estimate, Baccelle and Bosellini (1965) | ||
| 34 | Silicoflagellates, aberrant | Silicoflagellates aberrant | Lozar, Francesca | Abundance estimate, Baccelle and Bosellini (1965) | C = common (>1 specimen per 50-100 FOV), F = few (1 specimen per 50-100 FOV), R = rare (1 specimen per 100-200 FOV), N = absent |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
1419 data points