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Gupta, Anil K; Sarkar, Sudipta; Mukherjee, Baidehi (2006): Distribution of benthic foraminifera in DSDP Hole 24-238 in the Central Indian Ocean (Appendix A) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.691485, Supplement to: Gupta, AK et al. (2006): Paleoceanographic changes during the past 1.9 Myr at DSDP Site 238, Central Indian Ocean Basin: Benthic foraminiferal proxies. Marine Micropaleontology, 60(2), 157-166, https://doi.org/10.1016/j.marmicro.2006.04.001

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Abstract:
Deep-sea benthic foraminifera have been quantitatively analyzed in samples (>125 µm size fraction) from Ocean Drilling Program (ODP) Site 238, to understand paleoceanographic changes in the Central Indian Basin over the past 1.9 Myr. Factor and cluster analyses of the 25 highest-ranked species made it possible to identify five biofacies, characterizing distinct deep-sea environmental settings. The environmental interpretation of each biofacies is based on the ecology of recent deep-sea benthic foraminifera. The benthic faunal record indicates fluctuating deep-sea conditions in environmental parameters including oxygenation, surface productivity and organic food supply. These changes appear to be linked to Indian summer monsoon variability, the main climatic feature of the Indian Ocean region. The benthic assemblages show a major shift at ~0.7 to 0.6 Ma, marked by major turnovers in the relative abundances of species, coinciding with an increased amplitude of glacial cycles. These cycles appear to have influenced low latitude monsoonal climate as well as deep-sea conditions in the Central Indian Ocean Basin.
Project(s):
Coverage:
Latitude: -11.153500 * Longitude: 70.526000
Date/Time Start: 1972-06-16T00:00:00 * Date/Time End: 1972-06-16T00:00:00
Minimum DEPTH, sediment/rock: 0.06 m * Maximum DEPTH, sediment/rock: 30.40 m
Event(s):
24-238 * Latitude: -11.153500 * Longitude: 70.526000 * Date/Time: 1972-06-16T00:00:00 * Elevation: -2832.0 m * Penetration: 586.5 m * Recovery: 424 m * Location: Indian Ocean//FRACTURE ZONE * Campaign: Leg24 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 63 cores; 577 m cored; 9.5 m drilled; 73.5 % recovery
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
DEPTH, sediment/rockDepth sedmGeocode
AGEAgeka BPGeocode
Sample code/labelSample labelGupta, Anil KDSDP/ODP/IODP sample designation
Astrononion umbilicatulumA. umbilicatulum%Gupta, Anil KCounting >125 µm fraction
Bulimina alazanensisB. alazanensis%Gupta, Anil KCounting >125 µm fraction
Cassidulina carinataC. carinata%Gupta, Anil KCounting >125 µm fraction
Cibicidoides wuellerstorfiC. wuellerstorfi%Gupta, Anil KCounting >125 µm fraction
Eggerella bradyiE. bradyi%Gupta, Anil KCounting >125 µm fraction
Ehrenbergina carinataE. carinata%Gupta, Anil KCounting >125 µm fraction
10 Epistominella exiguaE. exigua%Gupta, Anil KCounting >125 µm fraction
11 Favocassidulina australisF. australis%Gupta, Anil KCounting >125 µm fraction
12 Favocassidulina favusF. favus%Gupta, Anil KCounting >125 µm fraction
13 Globocassidulina pacificaG. pacifica%Gupta, Anil KCounting >125 µm fraction
14 Globocassidulina subglobosaG. subglobosa%Gupta, Anil KCounting >125 µm fraction
15 Gyroidinoides cibaoensisG. cibaoensis%Gupta, Anil KCounting >125 µm fraction
16 Gyroidinoides nitidulaG. nitidula%Gupta, Anil KCounting >125 µm fraction
17 Gyroidinoides poliusG. polius%Gupta, Anil KCounting >125 µm fraction
18 Laticarinina pauperataL. pauperata%Gupta, Anil KCounting >125 µm fraction
19 Nuttallides umboniferaN. umbonifera%Gupta, Anil KCounting >125 µm fraction
20 Oridorsalis umbonatusO. umbonatus%Gupta, Anil KCounting >125 µm fraction
21 Pullenia bulloidesP. bulloides%Gupta, Anil KCounting >125 µm fraction
22 Pullenia osloensisP. osloensis%Gupta, Anil KCounting >125 µm fraction
23 Pullenia quinquelobaP. quinqueloba%Gupta, Anil KCounting >125 µm fraction
24 Pyrgo murrhinaP. murrhina%Gupta, Anil KCounting >125 µm fraction
25 Quinqueloculina weaveriQ. weaveri%Gupta, Anil KCounting >125 µm fraction
26 Siphotextularia rolshauseniS. rolshauseni%Gupta, Anil KCounting >125 µm fraction
27 Uvigerina hispidocostataU. hispidocostata%Gupta, Anil KCounting >125 µm fraction
28 Uvigerina proboscideaU. proboscidea%Gupta, Anil KCounting >125 µm fraction
Size:
2340 data points

Data

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


Depth sed [m]

Age [ka BP]

Sample label

A. umbilicatulum [%]

B. alazanensis [%]

C. carinata [%]

C. wuellerstorfi [%]

E. bradyi [%]

E. carinata [%]
10 
E. exigua [%]
11 
F. australis [%]
12 
F. favus [%]
13 
G. pacifica [%]
14 
G. subglobosa [%]
15 
G. cibaoensis [%]
16 
G. nitidula [%]
17 
G. polius [%]
18 
L. pauperata [%]
19 
N. umbonifera [%]
20 
O. umbonatus [%]
21 
P. bulloides [%]
22 
P. osloensis [%]
23 
P. quinqueloba [%]
24 
P. murrhina [%]
25 
Q. weaveri [%]
26 
S. rolshauseni [%]
27 
U. hispidocostata [%]
28 
U. proboscidea [%]
0.062024-238,1-1,6-81.062.840.009.221.422.131.423.194.616.389.570.007.800.003.900.004.265.321.061.060.711.770.000.006.74
0.083024-238,1-1,8-111.502.261.7512.030.001.500.500.000.000.0013.533.011.751.503.763.519.271.250.000.000.751.000.000.7513.28
0.325024-238,1-1,32-350.293.790.008.160.584.661.751.460.292.0418.081.174.661.172.928.164.374.960.000.290.580.000.000.299.62
0.676024-238,1-1,67-700.993.310.006.621.663.972.980.990.007.9513.251.322.651.322.325.636.955.632.650.000.660.000.000.998.94
1.068024-238,1-1,106-1090.671.680.008.390.004.034.032.010.005.0314.430.673.362.684.706.387.051.012.350.341.340.340.001.348.05
1.389024-238,1-1,138-1401.014.700.007.720.344.032.352.680.005.7014.772.014.032.684.038.395.703.361.010.670.000.000.000.006.04
1.7010024-238,1-2,20-221.411.060.0010.250.003.891.772.470.001.7715.550.353.531.063.536.3611.314.950.350.350.000.000.000.009.89
1.9612024-238,1-2,46-482.462.460.006.340.354.582.822.460.001.4116.201.062.111.762.828.105.634.581.411.060.350.700.000.3510.56
2.3113024-238,1-2,81-830.362.150.007.530.003.943.231.790.000.7216.851.082.152.512.1511.476.815.380.720.000.000.000.000.729.32
2.6614024-238,1-2,116-1181.133.380.006.770.753.763.381.500.000.0016.920.753.381.130.7510.535.644.890.750.380.750.000.000.759.40
2.9816024-238,1-2,148-1501.792.683.138.040.450.001.340.000.000.0013.393.574.024.465.802.239.383.130.000.000.000.450.001.3411.61
3.3017024-238,1-3,30-321.103.680.005.880.372.211.472.940.001.1016.910.745.152.212.578.097.723.681.100.370.000.370.000.376.99
3.6018024-238,1-3,60-620.751.870.008.961.121.121.872.990.000.7517.540.753.732.244.856.348.583.361.121.120.000.000.001.495.60
3.9420024-238,1-3,94-960.692.780.008.330.003.130.696.250.000.3522.220.692.432.433.133.829.722.430.690.350.000.350.001.396.94
4.3221024-238,1-3,132-1340.851.421.145.131.711.4212.821.710.000.857.121.714.270.850.287.128.263.704.840.282.280.281.141.143.70
4.5822024-238,1-4,8-110.362.140.366.410.711.0714.951.420.001.077.472.142.850.361.076.056.053.918.541.422.140.001.420.001.78
4.9324024-238,1-4,43-461.000.331.336.670.671.0018.330.000.330.007.331.673.331.670.6710.007.001.002.671.674.000.000.000.007.00
5.1725024-238,1-4,67-712.950.000.377.012.210.0018.450.370.740.004.801.483.692.580.375.549.595.176.270.742.210.000.370.002.58
5.5426024-238,1-4,104-1071.181.571.183.540.790.0019.290.001.180.004.724.334.720.790.397.879.450.7911.811.182.760.001.570.390.79
5.8528024-238,1-4,135-1382.661.901.906.844.940.0011.790.000.000.384.562.281.901.140.008.378.752.665.321.905.320.383.040.760.00
6.1529024-238,1-5,15-180.000.005.5710.920.860.0012.630.000.000.004.933.430.860.641.281.719.422.367.073.004.710.000.641.285.14
6.5530024-238,1-5,55-580.000.002.3311.674.670.0014.330.000.330.004.673.005.001.331.334.675.671.004.000.007.000.000.000.332.00
6.8632024-238,1-5,86-890.000.364.3811.682.550.0017.880.000.000.002.924.012.551.090.004.018.031.464.740.735.110.000.730.363.65
7.1233024-238,1-5,112-1150.001.142.664.564.181.5229.280.000.000.003.801.901.143.041.145.706.460.383.800.386.080.001.520.003.04
7.4634024-238,1-5,146-1492.441.050.354.535.230.006.270.000.000.006.273.482.440.350.353.487.672.7910.100.706.270.351.740.7011.85
7.7836024-238,1-6,28-311.941.163.499.690.000.0015.120.000.000.003.884.651.161.160.785.045.811.1610.082.711.940.391.160.393.10
8.1137024-238,1-6,61-640.750.001.899.811.510.7518.110.000.000.007.552.642.262.640.383.028.301.137.922.264.150.000.750.754.15
8.3838024-238,1-6,88-921.080.721.807.912.882.1618.710.361.080.004.681.442.161.801.084.687.911.088.991.442.520.000.361.085.04
8.7140024-238,1-6,121-1240.350.691.388.654.502.4210.380.001.040.009.342.770.691.380.354.848.301.386.921.732.080.001.730.0013.15
9.8041024-238,2-1,30-330.371.120.756.344.850.008.960.370.370.757.092.613.730.370.004.105.602.9910.450.372.240.001.490.009.33
10.0842024-238,2-1,58-610.001.722.586.670.220.659.680.000.000.0010.112.581.721.720.652.807.966.675.382.802.580.000.430.2214.19
10.3543024-238,2-1,85-880.341.370.346.143.412.3925.600.000.000.006.142.390.002.730.004.107.851.715.461.025.120.002.390.342.39
10.7645024-238,2-1,126-1290.000.780.3911.375.492.3521.960.000.000.009.020.000.781.570.393.534.712.353.140.787.450.001.960.000.00
11.0447024-238,2-2,4-83.500.780.788.565.841.1716.730.000.000.006.233.110.005.840.392.723.892.722.725.456.610.000.390.780.00
11.3948024-238,2-2,39-421.100.731.108.424.030.7317.220.000.000.004.763.300.375.130.006.964.762.202.205.493.300.002.931.100.37
11.6649024-238,2-2,66-692.640.750.755.284.151.1319.620.000.000.007.921.890.753.400.384.915.663.022.645.665.280.381.132.260.38
12.0451024-238,2-2,104-1071.460.002.5510.225.111.0914.600.000.000.006.572.550.361.820.004.3812.772.924.011.464.010.002.920.731.82
12.3552024-238,2-2,135-1382.661.142.664.183.041.9015.210.760.380.007.222.284.181.140.003.427.984.946.083.423.800.002.281.141.14
12.6953024-238,2-3,19-221.150.004.625.002.310.7718.460.000.000.3811.923.461.152.310.005.008.083.854.231.543.080.001.541.540.38
13.0154024-238,2-3,51-541.970.790.7910.243.151.1819.690.000.000.005.511.571.571.970.003.948.662.765.911.575.120.001.971.181.18
13.3556024-238,2-3,85-880.000.000.001.112.222.228.890.000.000.005.563.330.000.000.000.003.333.330.000.000.000.0044.440.000.00
13.6457024-238,2-3,114-1170.411.240.410.005.373.722.890.000.000.005.372.890.000.000.000.002.070.001.240.000.830.009.920.0013.22
13.9458024-238,2-3,144-1471.548.080.380.773.857.315.770.000.000.008.084.230.000.380.001.151.152.312.691.152.690.003.080.0021.92
14.2859024-238,2-4,28-300.787.390.390.003.506.234.670.000.000.0010.121.170.780.780.001.953.893.113.110.000.780.002.330.0020.62
14.6061024-238,2-4,60-621.1810.631.970.392.769.842.760.000.000.0011.812.760.000.390.004.330.795.912.360.390.790.390.390.3917.72
14.9763024-238,2-4,97-991.571.970.003.150.397.092.763.154.330.0015.751.973.941.971.575.129.454.332.361.180.390.000.000.799.45
15.2465024-238,2-4,124-1260.781.940.394.651.164.653.104.652.711.1617.441.551.551.162.713.497.754.260.780.001.550.000.000.7813.95
15.5667024-238,2-5,6-90.392.350.788.630.002.351.965.495.104.7116.861.184.711.571.966.279.801.960.780.390.390.780.000.788.63
15.8870024-238,2-5,38-402.301.150.008.050.383.451.5312.644.983.0715.711.534.212.301.533.836.511.920.000.000.000.000.000.778.43
16.2272024-238,2-5,72-753.762.260.751.881.501.507.140.380.000.008.655.261.130.380.006.777.893.016.771.132.630.001.504.1414.29
16.5374024-238,2-5,103-1064.420.001.474.240.370.745.340.370.000.007.186.811.291.660.376.635.894.052.581.661.470.001.295.8915.10
16.8376024-238,2-5,133-1363.180.272.122.391.061.066.100.800.000.004.776.371.060.000.007.962.652.929.022.122.653.452.128.7513.26
17.0678024-238,2-6,6-93.851.543.855.380.000.384.621.150.000.009.623.462.313.850.386.923.086.543.850.380.003.850.386.9211.15
17.4481024-238,2-6,44-471.630.650.000.001.630.3311.110.650.000.0013.401.963.920.651.313.593.924.256.210.332.292.610.3311.768.50
17.8083024-238,2-6,80-834.260.352.136.380.000.352.482.480.000.0012.414.613.551.420.001.424.962.844.260.712.845.670.355.6717.73
18.1085024-238,2-6,110-1131.190.400.003.160.401.982.370.000.000.0013.833.563.952.770.403.568.703.164.742.775.532.370.407.919.49
18.3587024-238,2-6,135-1381.130.380.003.770.004.151.130.000.000.009.431.894.910.000.003.027.554.536.043.023.773.771.136.0420.75
19.2689024-238,3-1,26-290.800.000.805.221.202.014.820.000.000.004.821.200.402.011.203.6115.262.014.020.804.022.810.406.4321.29
19.5991024-238,3-1,59-620.000.771.923.460.770.003.850.000.000.007.310.386.150.770.382.6916.153.083.460.385.000.770.776.1516.54
19.9294024-238,3-1,92-950.780.780.004.670.780.396.610.000.000.0017.121.562.722.721.561.1713.623.893.110.003.892.330.785.841.17
20.2296024-238,3-1,122-1254.630.000.008.020.310.000.620.000.000.0012.047.101.853.400.310.0012.350.620.310.318.334.010.005.564.63
20.5498024-238,3-2,4-61.890.380.006.441.890.385.680.000.000.008.712.657.581.520.380.0012.883.035.681.527.581.890.005.685.30
20.86100024-238,3-2,36-381.530.000.384.960.760.004.200.000.000.006.871.532.670.761.151.1517.181.156.110.761.533.820.008.7815.27
21.28102024-238,3-2,78-811.941.550.005.041.160.783.880.000.000.004.651.943.880.390.390.005.813.885.430.391.942.711.167.3618.99
21.58105024-238,3-2,108-1111.500.381.137.141.500.001.880.000.000.003.761.883.380.380.003.389.774.896.022.261.883.010.005.6419.92
21.92107024-238,3-2,142-1451.490.370.006.721.870.001.490.000.000.004.480.372.240.000.002.616.723.736.341.123.733.731.496.3423.51
22.24109024-238,3-3,24-270.680.000.004.073.390.002.030.000.000.007.801.362.371.021.021.367.462.033.731.366.443.732.717.1218.31
22.57111024-238,3-3,57-601.430.000.0012.860.710.001.790.000.000.007.501.071.790.711.431.436.793.577.861.793.571.790.005.3616.79
22.94113024-238,3-3,94-970.740.000.009.630.370.001.480.000.000.009.260.741.852.591.111.1110.742.964.071.112.960.370.745.1919.63
23.21115024-238,3-3,121-1240.000.000.004.010.360.000.000.000.001.094.011.461.460.731.460.364.382.554.380.734.012.190.002.5545.62
23.52118024-238,3-4,2-50.710.000.006.710.350.001.060.000.000.006.015.651.060.002.471.0610.950.711.061.771.774.590.350.0027.56
23.85120024-238,3-4,35-380.350.001.417.420.000.351.410.000.002.479.192.471.410.001.410.007.422.124.590.003.184.950.001.7730.04
24.28122024-238,3-4,78-810.000.000.366.571.090.000.730.000.000.364.010.002.190.362.190.369.851.460.730.002.191.090.005.1141.97
24.57124024-238,3-4,107-1100.380.000.774.230.381.154.230.770.770.386.151.921.540.383.084.628.854.237.311.542.311.920.381.1518.85
24.90126024-238,3-4,140-1430.400.000.806.830.402.010.000.000.000.007.230.803.610.402.410.005.624.022.810.001.611.610.000.4035.34
25.22129024-238,3-5,22-250.370.370.002.600.002.602.230.000.000.006.691.861.490.370.741.498.552.235.580.002.971.861.862.9736.80
25.54131024-238,3-5,54-570.690.690.002.750.001.030.000.000.000.347.560.692.750.341.030.696.191.723.090.341.722.411.374.4742.96
25.89133024-238,3-5,89-920.350.000.007.040.001.061.060.000.000.357.041.412.110.700.350.705.281.062.461.063.520.350.005.2837.68
26.18135024-238,3-5,118-1211.190.791.194.373.571.5911.510.400.000.0010.323.971.980.791.987.546.352.383.970.003.570.001.593.1710.71
26.50137024-238,3-6,0-30.000.390.785.494.712.758.630.000.000.007.061.183.530.780.786.677.842.754.310.001.960.000.781.9612.55
26.82139024-238,3-6,32-352.830.001.776.710.000.710.710.000.000.003.533.894.590.351.060.0013.071.770.000.351.061.411.062.1231.10
27.21142024-238,3-6,71-741.851.111.487.382.950.376.270.000.000.378.860.372.580.740.377.7512.554.063.691.485.170.001.110.746.27
27.56144024-238,3-6,106-1090.390.000.7813.732.752.759.800.000.000.004.711.570.782.350.399.4114.123.533.140.004.310.001.961.576.27
27.86146024-238,3-6,136-1392.790.400.808.372.392.796.770.000.400.005.583.192.390.802.797.1713.152.392.790.402.790.000.401.2013.55
28.79148024-238,4-1,29-321.141.141.145.324.940.387.980.002.660.0013.691.521.522.660.764.566.085.703.041.141.140.001.141.5212.17
29.16162024-238,4-1,66-690.780.780.785.475.081.959.380.002.730.396.250.392.341.950.395.085.864.307.421.170.390.001.951.1712.89
29.44169024-238,4-1,94-971.593.571.191.191.595.9512.300.001.980.009.521.190.790.400.008.734.375.163.570.400.400.000.790.4014.68
29.76176024-238,4-1,126-1293.453.450.001.922.307.284.980.003.450.0014.182.300.381.921.153.454.984.605.361.530.380.000.000.0014.56
30.15184024-238,4-2,15-180.761.911.536.493.443.0510.310.004.200.007.251.911.530.761.5310.694.584.583.440.761.150.001.150.0014.50
30.40192024-238,4-2,40-427.780.390.785.060.780.783.890.390.000.009.732.330.782.720.783.896.615.454.674.671.172.330.002.335.84