Murray, David W; Schrader, Hans-Jürgen (1982): (Table 1) Composite surface scraping samples and Coscinodiscus nodulifer abundance from DSDP Hole 64-480 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.819121, Supplement to: Murray, DW; Schrader, H-J (1982): The size distribution of the centric diatom Coscinodiscus nodulifer, Site 480, Guaymas Basin Slope, Gulf of California. In: Curray, JR; Moore, DG; et al. (eds.), Initial Reports of the Deep Sea Drilling Project (U.S. Govt. Printing Office), 64, 1239-1244, https://doi.org/10.2973/dsdp.proc.64.163.1982
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Abstract:
Analysis of individual laminae in Recent sediments from the slopes of the Guaymas Basin indicates an increased abundance of the larger sizes (>60 µm) of Coscinodiscus nodulifer when upwelling conditions persist over the depositional site and an increase of the smaller sizes (<60 µm) when nonupwelling conditions exist. The size distributions of C. nodulifer in 10-cm composite samples from Hole 480 show a greater abundance of the large sizes (>60 µm) associated with well-laminated sections and more of the smaller sizes (<60 µm) in samples from the homogeneous sections. We have tentatively correlated the pronounced homogeneous zones with late Pleistocene glacial periods. These results indicate a persistence of nonupwelling conditions over Hole 480 during glacial periods (homogeneous zones) and a predominance of upwelling conditions during interglacial periods (laminated zones). Other evidence from diatom and silicoflagellate floral analysis seems to support these preliminary conclusions.
Project(s):
Deep Sea Drilling Project (DSDP)
Coverage:
Latitude: 27.901700 * Longitude: -111.655700
Date/Time Start: 1978-12-31T00:00:00 * Date/Time End: 1978-12-31T00:00:00
Minimum Elevation: -655.0 m * Maximum Elevation: -655.0 m
Event(s):
64-480 * Latitude: 27.901700 * Longitude: -111.655700 * Date/Time: 1978-12-31T00:00:00 * Elevation: -655.0 m * Penetration: 152.1 m * Recovery: 117.3 m * Location: North Pacific/Gulf of California/BASIN * Campaign: Leg64 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 30 cores; 144 m cored; 4.8 m drilled; 81.5 % recovery
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Sample code/label | Sample label | Murray, David W | DSDP/ODP/IODP sample designation | ||
| 2 | Description | Description | Murray, David W | |||
| 3 | Coscinodiscus nodulifer | C. nodulifer | Murray, David W | Smear slide analysis |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
96 data points
Data
| 1 Sample label | 2 Description | 3 C. nodulifer |
|---|---|---|
| 64-480-1-1,0-10 | Well laminated | Present (> 100 on the slide) |
| 64-480-1-1,10-20 | Well laminated | Present (> 100 on the slide) |
| 64-480-2-3,70-80 | Well laminated | Not present (barren) |
| 64-480-3-3,20-30 | Not laminated (homogeneous) | Present (> 100 on the slide) |
| 64-480-4-3,30-40 | Not laminated (homogeneous) | Present (> 100 on the slide) |
| 64-480-5-2,120-130 | Not laminated (homogeneous) | Present (> 100 on the slide) |
| 64-480-6-2,90-100 | Well laminated | Present (> 100 on the slide) |
| 64-480-6-3,20-30 | Not laminated (homogeneous) | Present (> 100 on the slide) |
| 64-480-8-2,20-30 | Not laminated (homogeneous) | Present (> 100 on the slide) |
| 64-480-8-2,100-110 | Well laminated | Present (> 100 on the slide) |
| 64-480-9-3,20-30 | Not laminated (homogeneous) | Present (> 100 on the slide) |
| 64-480-10-1,130-140 | Well laminated | Present (> 100 on the slide) |
| 64-480-11-1,100-110 | Well laminated | Present (> 100 on the slide) |
| 64-480-11-1,140-150 | Well laminated | Present (> 100 on the slide) |
| 64-480-13-1,0-10 | Not laminated (homogeneous) | Present (> 100 on the slide) |
| 64-480-14-1,90-100 | Well laminated | Present (> 100 on the slide) |
| 64-480-15-2,10-13 | Not laminated (homogeneous) | Rare (10-100 on the slide) |
| 64-480-16-2,120-130 | Well laminated | Rare (10-100 on the slide) |
| 64-480-17-1,100-110 | Not laminated (homogeneous) | Trace (< 10 on the slide) |
| 64-480-17-3,40-50 | Well laminated | Trace (< 10 on the slide) |
| 64-480-18-1,0-10 | Not laminated (homogeneous) | Not present (barren) |
| 64-480-18-3,80-90 | Well laminated | Not present (barren) |
| 64-480-19-2,0-10 | Not laminated (homogeneous) | Not present (barren) |
| 64-480-20-2,120-130 | Well laminated | Not present (barren) |
| 64-480-22-1,0-10 | Not laminated (homogeneous) | Not present (barren) |
| 64-480-22-3,50-60 | Well laminated | Not present (barren) |
| 64-480-25-1,20-30 | Well laminated | Not present (barren) |
| 64-480-26-1,110-120 | Well laminated | Not present (barren) |
| 64-480-27-1,70-80 | Not laminated (homogeneous) | Trace (< 10 on the slide) |
| 64-480-27-3,10-20 | Well laminated | Not present (barren) |
| 64-480-29-2,30-40 | Well laminated | Present (> 100 on the slide) |
| 64-480-31-1,30-40 | Well laminated | Not present (barren) |