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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):
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):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
Sample code/labelSample labelBarron, John ADSDP/ODP/IODP sample designation
DEPTH, sediment/rockDepth sedmGeocode
Age modelAge modelkaBarron, John AAge model, biostratigraphy
Actinoptychus spp.Actinoptychus spp.%Barron, John ACounting, diatoms
Azpeitia noduliferaA. nodulifera%Barron, John ACounting, diatoms
Delphineis spp.Delphineis spp.%Barron, John ACounting, diatoms
Chaetoceros sporesChaet spores%Barron, John ACounting, diatoms
Coscinodiscus marginatusC. marginatus%Barron, John ACounting, diatoms
Hemidiscus cuneiformisH. cuneiformis%Barron, John ACounting, diatoms
10 Neodenticula kamtschaticaN. kamtschatica%Barron, John ACounting, diatoms
11 Neodenticula koizumiiN. koizumii%Barron, John ACounting, diatoms
12 Nitzschia reinholdiiN. reinholdii%Barron, John ACounting, diatoms
13 Proboscia barboiP. barboi%Barron, John ACounting, diatoms
14 Rhizosolenia spp.Rhizosolenia spp.%Barron, John ACounting, diatoms
15 Stephanopyxis spp.Stephanopyxis spp.%Barron, John ACounting, diatoms
16 Thalassionema nitzschioidesT. nitzschioides%Barron, John ACounting, diatoms
17 Thalassiosira oestrupiiT. oestrupii%Barron, John ACounting, diatoms
18 Thalassiosira spp.Thalassiosira spp.%Barron, John ACounting, diatoms
19 Thalassiothrix longissimaT. longissima%Barron, John ACounting, diatoms
20 Diatoms, benthicDiatom benthic%Barron, John ACounting, diatomsincluding freshwater taxa
21 Diatoms, reworkedDiatom rew%Barron, John ACounting, diatoms
22 Diatoms, plankticDiatom plank%Barron, John ACounting, diatomsothers
23 CountsCounts#Barron, John Atotal
Size:
748 data points

Data

Download dataset as tab-delimited text — use the following character encoding:


Sample label

Depth sed [m]

Age model [ka]

Actinoptychus spp. [%]

A. nodulifera [%]

Delphineis spp. [%]

Chaet spores [%]

C. marginatus [%]

H. cuneiformis [%]
10 
N. kamtschatica [%]
11 
N. koizumii [%]
12 
N. reinholdii [%]
13 
P. barboi [%]
14 
Rhizosolenia spp. [%]
15 
Stephanopyxis spp. [%]
16 
T. nitzschioides [%]
17 
T. oestrupii [%]
18 
Thalassiosira spp. [%]
19 
T. longissima [%]
20 
Diatom benthic [%]
21 
Diatom rew [%]
22 
Diatom plank [%]
23 
Counts [#]
167-1022A-9H-1,50-5271.5025000.01.03.632.30.00.00.035.00.00.01.04.09.92.09.61.00.70.00.0303
167-1022A-9H-2,50-5273.0025300.00.04.016.80.00.015.028.30.00.00.60.012.10.618.51.71.70.60.0173
167-1022A-9H-3,50-5274.5025500.02.51.234.67.40.00.07.40.04.92.512.39.92.512.32.50.00.00.040
167-1022A-9H-4,50-5276.0025700.00.01.646.42.30.01.830.80.00.01.80.07.40.96.00.50.50.00.0218
167-1022A-9H-5,50-5277.5025900.31.30.329.42.31.00.722.20.30.30.32.021.22.912.71.30.30.00.7306
167-1022A-9H-6,50-5279.0026201.71.00.326.03.30.00.338.70.00.70.70.713.31.010.01.71.00.00.7300
167-1022A-9H-7,50-5280.5026400.30.61.938.20.80.30.829.20.30.31.41.19.20.011.41.11.40.80.6359
167-1022A-10H-1,50-5281.0026601.01.02.326.22.31.30.733.80.01.71.01.013.91.08.30.71.70.01.7302
167-1022A-10H-2,50-5282.5026900.00.73.032.00.70.722.87.30.00.32.03.618.20.06.61.00.30.30.3303
167-1022A-10H-3,50-5284.0027100.00.32.323.01.00.340.83.60.30.30.70.319.40.35.30.30.00.30.7304
167-1022A-10H-5,50-5285.9227400.71.42.442.00.20.213.22.80.50.20.73.821.20.96.40.90.90.20.9424
167-1022A-10H-6,50-5287.0327600.00.01.222.71.60.428.54.70.40.41.20.828.10.85.90.40.80.01.2256
167-1022A-10H-7,50-5288.5327802.03.60.724.43.31.75.65.30.34.00.74.025.74.68.91.30.70.02.6303
167-1022A-11H-1,50-5290.5028000.45.02.122.16.01.82.12.80.73.91.82.827.03.615.71.80.70.00.0281
167-1022A-11H-2,50-5292.0028300.30.62.952.40.31.01.91.90.60.61.32.923.31.34.80.61.00.01.3313
167-1022A-11H-3,50-5293.5028500.42.61.328.83.51.75.21.31.33.10.93.524.51.710.01.72.60.92.6229
167-1022A-11H-4,50-5295.0028701.92.32.331.55.21.03.21.00.61.91.92.926.62.911.01.32.60.30.6308
167-1022A-11H-5,50-5296.5029003.03.02.333.24.00.75.02.30.31.31.72.328.22.08.60.31.01.01.3301
167-1022A-11H-6,50-5298.0029201.61.91.923.73.10.39.31.90.61.91.23.428.73.411.80.92.20.61.6321
167-1022A-11H-7,50-5299.5029400.71.30.727.66.30.012.00.00.33.02.00.330.20.79.62.72.70.70.0301
167-1022A-12H-1,50-52100.0029600.71.70.724.94.00.718.60.00.01.72.02.025.63.711.31.01.30.30.3301
167-1022A-12H-2,50-52101.5429903.10.70.724.20.30.018.00.00.30.30.71.436.72.47.30.73.10.31.4289
167-1022A-12H-3,50-52103.0430102.14.22.126.62.10.06.30.00.02.12.83.535.00.76.30.75.62.10.0143
167-1022A-12H-4,50-52104.5430300.71.01.320.52.00.026.10.30.00.30.70.034.70.75.90.73.00.31.3303
167-1022A-12H-5,50-52106.0430601.61.01.021.010.50.310.80.00.02.90.63.530.60.68.00.62.90.62.5314
167-1022A-12H-6,50-52107.5430801.90.60.320.215.10.315.70.60.37.12.63.810.92.211.52.91.00.32.2312
167-1022A-12H-7,50-52109.0431001.30.31.322.414.10.314.10.31.05.60.36.911.51.614.12.61.30.70.7304
167-1022A-13H-1,50-52109.5031103.00.31.319.614.00.06.30.00.33.04.03.334.61.05.02.00.31.30.7301
167-1022A-13H-2,53-55111.0331300.30.70.026.95.00.312.60.30.71.04.73.730.61.05.62.72.00.71.3301
167-1022A-13H-3,50-52112.5031600.80.80.830.54.60.09.20.00.80.83.86.935.10.02.30.02.31.50.0131
167-1022A-13H-4,50-52114.0031800.30.30.734.79.60.05.90.30.31.32.67.321.51.37.63.31.30.31.3303
167-1022A-13H-5,50-52115.5032000.70.01.629.23.90.011.50.00.31.60.74.636.10.06.61.30.70.70.7305
167-1022A-13H-6,50-52117.0032300.00.01.337.53.90.72.00.00.70.70.73.940.80.73.90.72.00.70.0152
167-1022A-13H-7,50-52118.5032500.60.30.328.210.90.610.91.02.60.62.64.825.31.05.11.91.90.60.6312