Matsuoka, Hiromi; Okada, Hisatake (2019): Measured coccolith-size data of the Genus Gephyrocapsa in the Quaternary Sequence of the Tropical Indian Ocean, ODP Hole 115-709C [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.903745, Supplement to: Matsuoka, H; Okada, H (1990): Time-progressive morphometric changes of the genus Gephyrocapsa in the Quaternary sequence of the tropical Indian Ocean, Site 709. In: Duncan, RA; Backmann, J; Peterson, LC; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 115, 255-270, https://doi.org/10.2973/odp.proc.sr.115.155.1990
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Abstract:
Stratigraphic variations in the morphometry of the genus Gephyrocapsa were quantitatively investigated in the Quaternary sequence of ODP Hole 115-709C recovered from the tropical Indian Ocean. This is raw data of the measurement.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Latitude: -3.915000 * Longitude: 60.551670
Date/Time Start: 1987-05-07T04:00:00 * Date/Time End: 1987-06-08T17:00:00
Minimum DEPTH, sediment/rock: 0.02 m * Maximum DEPTH, sediment/rock: 17.62 m
Event(s):
115-709C * Latitude: -3.915000 * Longitude: 60.551670 * Date/Time Start: 1987-05-07T04:00:00 * Date/Time End: 1987-06-08T17:00:00 * Elevation: -3039.0 m * Penetration: 353.7 m * Recovery: 330.03 m * Location: South Indian Ridge, South Indian Ocean * Campaign: Leg115 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 37 cores; 353.7 m cored; 0 m drilled; 93.3 % recovery
Comment:
The first 200 specimens of Gephyrocapsa species were measured for the overall size of the coccolith, the diameter of the central opening, and the angle of the central bridge vs. the long axis of the coccolith. The two lengths were measured to 0.1 µm precision. Because the bridge angle is difficult to measure precisely under a transmission microscope, it was classified into six categories:1 (0° - 15°), 2 (15° - 30°), 3 (30° - 45°), 4 (45° - 60°), 5 (60° - 75°), and 6 (75° - 90°). The angle of the central bridge on 0° means parallel to long axis of the coccolith. For those samples in which the small forms dominated the flora and the large forms were scarce, additional measurements were conducted exclusively for the large forms to obtain a sufficient data set.
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | DEPTH, sediment/rock | Depth sed | m | Matsuoka, Hiromi | Geocode – mbsf | |
| 2 | Comment | Comment | Matsuoka, Hiromi | additionally measured large specimens | ||
| 3 | Coccoliths, overall size | Cocco size | µm | Matsuoka, Hiromi | ||
| 4 | Coccoliths, diameter of central opening | Cocco diam open | µm | Matsuoka, Hiromi | ||
| 5 | Coccoliths, bridge angle category | Cocco bridge angel cat | Matsuoka, Hiromi | |||
| 6 | Morphotype | Morphotype | Matsuoka, Hiromi |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Size:
38360 data points
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