Barron, John A (2000): (Table 1) Abundance of selected diatom taxa in the mid-Pliocene of ODP Hole 167-1022A [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.793333, Supplement to: Barron, JA (2000): Data Report: Mid-Pliocene diatom assemblages at Sites 1016, 1021, and 1022. In: Lyle, M; Koizumi, I; Richter, C; Moore, TC Jr (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 167, 1-3, https://doi.org/10.2973/odp.proc.sr.167.226.2000
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Abstract:
Diatom assemblages from the middle part of the Pliocene (3.2-2.5 Ma) were investigated from Ocean Drilling Program Sites 1016, 1021, and 1022 in an effort to infer paleotemperature fluctuations off California. Diatoms are very sparse in virtually all of the samples that were examined from Sites 1016 and 1021. This is presumably because these sites were seaward (west) of the coastal zone of diatom productivity during the middle part of the Pliocene. Diatoms are relatively common in the vast majority of samples that were examined from Hole 1022A. Diatom assemblages are dominated by Chaetoceros spores (a coastal upwelling component), the cold-water (subarctic) taxa Neodenticula kamtschatica and its descendant Neodenticula koizumii, and Thalassionema nitzschioides, a temperate taxon that is typically found at the seaward edge of coastal upwelling zones. Paleotemperature interpretations, however, are not possible at this time because of the scarcity of comparative modern core-top data.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Latitude: 40.080800 * Longitude: -125.342000
Date/Time Start: 1992-06-18T17:00:00 * Date/Time End: 1996-06-17T22:00:00
Minimum DEPTH, sediment/rock: 71.50 m * Maximum DEPTH, sediment/rock: 118.50 m
Event(s):
167-1022A * Latitude: 40.080800 * Longitude: -125.342000 * Date/Time Start: 1996-06-17T22:00:00 * Date/Time End: 1992-06-18T17:00:00 * Elevation: -1927.0 m * Penetration: 166 m * Recovery: 171.57 m * Location: Juan de Fuca Ridge, North Pacific Ocean * Campaign: Leg167 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 18 cores; 166 m cored; 0 m drilled; 103.4 % recovery
Comment:
DEPTH, sediment is given in mbsf. Strewn slides were initially examined under the light microscope at 500x. Except where preservation was poor, at least 300 diatoms per slide were counted at 1250x.
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Sample code/label | Sample label | Barron, John A | DSDP/ODP/IODP sample designation | ||
| 2 | DEPTH, sediment/rock | Depth sed | m | Geocode | ||
| 3 | Age model | Age model | ka | Barron, John A | Age model, biostratigraphy | |
| 4 | Actinoptychus spp. | Actinoptychus spp. | % | Barron, John A | Counting, diatoms | |
| 5 | Azpeitia nodulifera | A. nodulifera | % | Barron, John A | Counting, diatoms | |
| 6 | Delphineis spp. | Delphineis spp. | % | Barron, John A | Counting, diatoms | |
| 7 | Chaetoceros spores | Chaet spores | % | Barron, John A | Counting, diatoms | |
| 8 | Coscinodiscus marginatus | C. marginatus | % | Barron, John A | Counting, diatoms | |
| 9 | Hemidiscus cuneiformis | H. cuneiformis | % | Barron, John A | Counting, diatoms | |
| 10 | Neodenticula kamtschatica | N. kamtschatica | % | Barron, John A | Counting, diatoms | |
| 11 | Neodenticula koizumii | N. koizumii | % | Barron, John A | Counting, diatoms | |
| 12 | Nitzschia reinholdii | N. reinholdii | % | Barron, John A | Counting, diatoms | |
| 13 | Proboscia barboi | P. barboi | % | Barron, John A | Counting, diatoms | |
| 14 | Rhizosolenia spp. | Rhizosolenia spp. | % | Barron, John A | Counting, diatoms | |
| 15 | Stephanopyxis spp. | Stephanopyxis spp. | % | Barron, John A | Counting, diatoms | |
| 16 | Thalassionema nitzschioides | T. nitzschioides | % | Barron, John A | Counting, diatoms | |
| 17 | Thalassiosira oestrupii | T. oestrupii | % | Barron, John A | Counting, diatoms | |
| 18 | Thalassiosira spp. | Thalassiosira spp. | % | Barron, John A | Counting, diatoms | |
| 19 | Thalassiothrix longissima | T. longissima | % | Barron, John A | Counting, diatoms | |
| 20 | Diatoms, benthic | Diatom benthic | % | Barron, John A | Counting, diatoms | including freshwater taxa |
| 21 | Diatoms, reworked | Diatom rew | % | Barron, John A | Counting, diatoms | |
| 22 | Diatoms, planktic | Diatom plank | % | Barron, John A | Counting, diatoms | others |
| 23 | Counts | Counts | # | Barron, John A | total |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
748 data points