Pearce, Richard B; Kemp, Alan E S; Baldauf, Jack G; King, S C (1995): (Table 2) Details of laminated intervals of ODP Leg 158 holes [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.807846, Supplement to: Pearce, RB et al. (1995): High-resolution sedimentology and micropaleontology of laminated diatomaceous sediments from the eastern Equatorial Pacific Ocean. In: Pisias, NG; Mayer, LA; Janecek, TR; Palmer-Julson, A; van Andel, TH (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 138, 647-663, https://doi.org/10.2973/odp.proc.sr.138.135.1995
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Abstract:
Scanning electron microscope (SEM)-based analyses of the laminated diatom oozes encountered during Leg 138 reveal three major laminae types. The first lamina type is composed of multiple layers of ~20-?m-thick diatom mats, which form laminae dominated by assemblages of the pennate diatom, Thalassiothrix longissima. More than one variety/subspecies of T. longissima occurs within these laminae (referred to as the T. longissima Group). The second lamina type is composed of a mixed-assemblage of several species of diatoms (centric and pennate varieties), calcareous nannofossils, and subordinate quantities of radiolarians, silicoflagellates and foraminifers. The third lamina type is dominated by an assemblage of nannofossils and minor amounts of those fossil components mentioned above. This last form of lamination is compositionally similar to the background sediment type, foraminifernannofossil ooze (F-NO). Two lamina associations occur within the laminated intervals; the first comprises alternations of T. longissima Group and mixed-assemblage laminae (average thickness is ~6 mm) and the second is composed of T. longissima and nannofossil-rich laminae (average thickness is ~3.5 mm). The arrangement of laminae probably originates from the deposition of multiple layers of 20-?m-thick mats from one mat-flux episode. The much thinner nannofossil-rich laminae are interpreted to represent periods of more ônormalö deposition between mat-flux episodes. The occurrence of several varieties/subspecies of T. longissima within individual mat layers is consistent with observations of Rhizosolenia diatom mats in the modern world ocean.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: 2.582811 * Median Longitude: -101.716731 * South-bound Latitude: 0.183050 * West-bound Longitude: -110.571480 * North-bound Latitude: 7.921310 * East-bound Longitude: -90.480760
Date/Time Start: 1991-05-11T10:24:00 * Date/Time End: 1991-08-09T06:00:00
Minimum Elevation: -3839.1 m * Maximum Elevation: -3334.3 m
Event(s):
138-844B * Latitude: 7.921310 * Longitude: -90.480760 * Date/Time Start: 1991-08-09T06:00:00 * Date/Time End: 1991-05-11T10:24:00 * Elevation: -3414.5 m * Penetration: 290.9 m * Recovery: 289.92 m * Location: North Pacific Ocean * Campaign: Leg138 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 31 core; 290.9 m cored; 0 m drilled; 99.7 % recovery
138-844C * Latitude: 7.921310 * Longitude: -90.480760 * Date/Time Start: 1991-05-11T10:24:00 * Date/Time End: 1991-05-12T08:04:00 * Elevation: -3414.5 m * Penetration: 180.1 m * Recovery: 189.34 m * Location: North Pacific Ocean * Campaign: Leg138 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 19 cores; 180.1 m cored; 0 m drilled; 105.1 % recovery
138-847B * Latitude: 0.193210 * Longitude: -95.320450 * Date/Time Start: 1991-05-28T06:50:00 * Date/Time End: 1991-05-29T18:40:00 * Elevation: -3334.3 m * Penetration: 247 m * Recovery: 242.19 m * Location: North Pacific Ocean * Campaign: Leg138 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 27 cores; 247 m cored; 0 m drilled; 98.1 % recovery
Comment:
DEPTH, sediment is given in mbsf.
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | ||||
| 2 | Sample code/label | Sample label | Pearce, Richard B | DSDP/ODP/IODP sample designation | ||
| 3 | Thickness | Thick | mm | Pearce, Richard B | ||
| 4 | Number | No | Pearce, Richard B | T. longissima-rich | ||
| 5 | Thickness | Thick | mm | Pearce, Richard B | T. longissima-rich, mean | |
| 6 | Standard deviation | Std dev | ± | Pearce, Richard B | T. longissima-rich, thickness | |
| 7 | Range, minimum | Min | mm | Pearce, Richard B | T. longissima-rich | |
| 8 | Range, maximum | Max | mm | Pearce, Richard B | T. longissima-rich | |
| 9 | Number | No | Pearce, Richard B | Mixed-assemblage | ||
| 10 | Thickness | Thick | mm | Pearce, Richard B | Mixed-assemblage, mean | |
| 11 | Standard deviation | Std dev | ± | Pearce, Richard B | Mixed-assemblage, thickness | |
| 12 | Range, minimum | Min | mm | Pearce, Richard B | Mixed-assemblage | |
| 13 | Range, maximum | Max | mm | Pearce, Richard B | Mixed-assemblage | |
| 14 | Number | No | Pearce, Richard B | Nannofossil-rich | ||
| 15 | Thickness | Thick | mm | Pearce, Richard B | Nannofossil-rich, mean | |
| 16 | Standard deviation | Std dev | ± | Pearce, Richard B | Nannofossil-rich, thickness | |
| 17 | Range, minimum | Min | mm | Pearce, Richard B | Nannofossil-rich | |
| 18 | Range, maximum | Max | mm | Pearce, Richard B | Nannofossil-rich | |
| 19 | Group | Group | Pearce, Richard B | lamina associations |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
372 data points