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Baumann, Karl-Heinz; Heidersdorf, Felix (2026): Nannofossil absolute abundances of sediment core GeoB2204-2 [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.993440 (DOI registration in progress)

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Published: 2026-04-07

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Abstract:
The calcareous nannofossil assemblages from sediment core GeoB2204-2 from the western equatorial region off Brazil were examined to document oceanographic changes in surface waters during the last 155 ka. Coccolith counts (N) were made manually using a Zeiss DSM 940A scanning electron microscope at 3,000x or 5,000x magnification. The recorded fluctuations in the abundance and composition of coccolithophore communities reflect changes in surface water masses. The community is dominated by species from the deeper photic zone, such as Florisphaera profunda and Gladiolithus flabellatus, indicating predominantly oligotrophic conditions during glacial periods. During interglacial periods, higher abundances and larger proportions of species with an affinity for nutrient-rich surface waters indicate the highest abundances.
Keyword(s):
coccolith abundances; equatorial western Atlantic; off Brazil
Related to:
Heidersdorf, Felix (2000): Palökologische Untersuchungen der Coccolithophoridengemeinschaften im Kern GeoB 2204-2 (äquatorialer Westatlantik) für den Zeitraum der letzten 155 ka [thesis]. Unpubl. Diplomarbeit (Master Thesis), University of Bremen, 57 pp
Coverage:
Latitude: -8.528333 * Longitude: -34.021667
Date/Time Start: 1993-03-22T00:00:00 * Date/Time End: 1993-03-22T00:00:00
Minimum DEPTH, sediment/rock: 0.145 m * Maximum DEPTH, sediment/rock: 3.645 m
Event(s):
GeoB2204-2 * Latitude: -8.528333 * Longitude: -34.021667 * Date/Time: 1993-03-22T00:00:00 * Elevation: -2072.0 m * Recovery: 8.97 m * Location: Brazil Basin * Campaign: M23/3 * Basis: Meteor (1986) * Method/Device: Gravity corer (Kiel type) (SL) * Comment: weight on top of sediment
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
DEPTH, sediment/rockDepth sedmBaumann, Karl-HeinzGeocode
Depth, correctedDepth corrmBaumann, Karl-Heinz
AGEAgeka BPBaumann, Karl-HeinzGeocode
Coccoliths, totalCocco106 #/gBaumann, Karl-HeinzScanning electron microscope (SEM), Zeiss, DSM 940A
Acanthoica spp.Acanthoica spp.106 #/gBaumann, Karl-HeinzScanning electron microscope (SEM), Zeiss, DSM 940A
Calciosolenia brasiliensisC. brasiliensis106 #/gBaumann, Karl-HeinzScanning electron microscope (SEM), Zeiss, DSM 940A
Calciosolenia murrayiC. murrayi106 #/gBaumann, Karl-HeinzScanning electron microscope (SEM), Zeiss, DSM 940A
Calcidiscus leptoporusC. leptoporus106 #/gBaumann, Karl-HeinzScanning electron microscope (SEM), Zeiss, DSM 940A
Calcidiscus quadriperforatusC. quadriperforatus106 #/gBaumann, Karl-HeinzScanning electron microscope (SEM), Zeiss, DSM 940A
10 Ceratolithus cristatusC. cristatus106 #/gBaumann, Karl-HeinzScanning electron microscope (SEM), Zeiss, DSM 940A
11 Discosphaera tubiferaD. tubifera106 #/gBaumann, Karl-HeinzScanning electron microscope (SEM), Zeiss, DSM 940A
12 Emiliania huxleyiE. huxleyi106 #/gBaumann, Karl-HeinzScanning electron microscope (SEM), Zeiss, DSM 940A
13 Florisphaera profundaF. profunda106 #/gBaumann, Karl-HeinzScanning electron microscope (SEM), Zeiss, DSM 940A
14 Gephyrocapsa ericsoniiG. ericsonii106 #/gBaumann, Karl-HeinzScanning electron microscope (SEM), Zeiss, DSM 940A
15 Gephyrocapsa muelleraeG. muellerae106 #/gBaumann, Karl-HeinzScanning electron microscope (SEM), Zeiss, DSM 940A
16 Gephyrocapsa oceanicaG. oceanica106 #/gBaumann, Karl-HeinzScanning electron microscope (SEM), Zeiss, DSM 940A
17 Gephyrocapsa ornataG. ornata106 #/gBaumann, Karl-HeinzScanning electron microscope (SEM), Zeiss, DSM 940A
18 Gladiolithus flabellatusG. flabellatus106 #/gBaumann, Karl-HeinzScanning electron microscope (SEM), Zeiss, DSM 940A
19 Hayaster perplexusH. perplexus106 #/gBaumann, Karl-HeinzScanning electron microscope (SEM), Zeiss, DSM 940A
20 Helicosphaera carteriH. carteri106 #/gBaumann, Karl-HeinzScanning electron microscope (SEM), Zeiss, DSM 940A
21 Oolithotus fragilisO. fragilis106 #/gBaumann, Karl-HeinzScanning electron microscope (SEM), Zeiss, DSM 940A
22 Pontosphaera spp.Pontosphaera spp.106 #/gBaumann, Karl-HeinzScanning electron microscope (SEM), Zeiss, DSM 940A
23 Reticulofenestra sessilisR. sessilis106 #/gBaumann, Karl-HeinzScanning electron microscope (SEM), Zeiss, DSM 940A
24 Rhabdosphaera clavigeraR. clavigera106 #/gBaumann, Karl-HeinzScanning electron microscope (SEM), Zeiss, DSM 940A
25 Rhabdosphaera styliferaR. stylifera106 #/gBaumann, Karl-HeinzScanning electron microscope (SEM), Zeiss, DSM 940A
26 Syracosphaera pulchraS. pulchra106 #/gBaumann, Karl-HeinzScanning electron microscope (SEM), Zeiss, DSM 940A
27 Syracosphaera spp.Syracosphaera spp.106 #/gBaumann, Karl-HeinzScanning electron microscope (SEM), Zeiss, DSM 940A
28 Umbilicosphaera hulburtianaU. hulburtiana106 #/gBaumann, Karl-HeinzScanning electron microscope (SEM), Zeiss, DSM 940A
29 Umbilicosphaera sibogaeU. sibogae106 #/gBaumann, Karl-HeinzScanning electron microscope (SEM), Zeiss, DSM 940A
30 Umbellosphaera irregularisU. irregularis106 #/gBaumann, Karl-HeinzScanning electron microscope (SEM), Zeiss, DSM 940A
31 Umbellosphaera tenuisU. tenuis106 #/gBaumann, Karl-HeinzScanning electron microscope (SEM), Zeiss, DSM 940A
32 Coccoliths, otherCocco oth106 #/gBaumann, Karl-HeinzScanning electron microscope (SEM), Zeiss, DSM 940A
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
2130 data points

Data

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


Depth sed [m]

Depth corr [m]

Age [ka BP]

Cocco [106 #/g]

Acanthoica spp. [106 #/g]

C. brasiliensis [106 #/g]

C. murrayi [106 #/g]

C. leptoporus [106 #/g]

C. quadriperforatus [106 #/g]
10 
C. cristatus [106 #/g]
11 
D. tubifera [106 #/g]
12 
E. huxleyi [106 #/g]
13 
F. profunda [106 #/g]
14 
G. ericsonii [106 #/g]
15 
G. muellerae [106 #/g]
16 
G. oceanica [106 #/g]
17 
G. ornata [106 #/g]
18 
G. flabellatus [106 #/g]
19 
H. perplexus [106 #/g]
20 
H. carteri [106 #/g]
21 
O. fragilis [106 #/g]
22 
Pontosphaera spp. [106 #/g]
23 
R. sessilis [106 #/g]
24 
R. clavigera [106 #/g]
25 
R. stylifera [106 #/g]
26 
S. pulchra [106 #/g]
27 
Syracosphaera spp. [106 #/g]
28 
U. hulburtiana [106 #/g]
29 
U. sibogae [106 #/g]
30 
U. irregularis [106 #/g]
31 
U. tenuis [106 #/g]
32 
Cocco oth [106 #/g]
0.1450.28511.516666.60.023.40.046.9140.646.923.42437.98696.7164.1328.2117.2140.61148.60.023.4117.20.093.8281.3117.246.9375.10.0421.91547.1304.723.4
0.1950.33513.619653.00.029.588.5118.0177.10.088.51859.19265.859.0649.259.00.05400.229.50.0118.00.00.088.588.529.5236.188.5324.6560.7295.10.0
0.2450.38515.613453.00.084.20.0252.642.10.00.01115.88210.8105.3294.7357.984.2442.142.163.2210.50.00.0105.342.184.2252.60.0400.01115.8147.40.0
0.2950.43517.615811.70.024.60.098.5246.324.60.01305.310639.6344.8812.749.324.6418.724.60.049.30.00.0147.80.049.3123.10.0344.8911.3147.824.6
0.3450.48519.513718.30.00.021.743.543.5108.70.0956.68391.8195.7434.887.00.01282.70.043.5108.70.00.0108.765.2282.687.00.0130.41152.2173.90.0
0.3950.53521.213975.50.042.142.1252.621.00.00.01199.78797.8336.8715.6147.30.0294.742.1105.2252.60.00.0147.30.0126.3189.40.0231.5947.184.20.0
0.4450.58522.914119.866.144.144.1682.90.0110.1198.31101.44493.7132.2132.2374.50.03965.066.10.0110.122.0154.2286.444.1308.444.144.1638.8925.2110.122.0
0.4950.63524.613581.10.041.962.9272.5188.60.041.9733.58173.8272.5775.5146.70.0167.762.90.0314.40.00.0293.4125.8209.6272.521.0712.6649.741.90.0
0.5450.68526.313546.90.0168.80.0379.80.042.2232.11012.94726.663.3274.3211.00.02848.663.384.4126.621.10.0611.9126.6400.9147.721.1886.2844.0189.963.3
0.5950.73528.012989.50.040.520.2222.660.70.00.0829.58619.2303.5526.160.740.5161.940.520.2202.30.00.0424.90.020.280.920.2526.1586.8182.10.0
0.6450.78529.78972.20.056.20.0140.456.20.028.1814.44282.5182.5365.1126.470.256.20.056.2351.028.1126.4308.942.184.2294.928.1744.2589.7140.40.0
0.6950.83531.49276.30.014.829.5103.414.80.014.8502.26351.6192.0590.829.529.5221.629.544.388.60.00.0177.30.088.6147.70.0192.0310.2103.40.0
0.7450.88533.111121.417.084.80.0254.3135.60.0152.6881.63831.5373.0729.0152.617.02356.533.917.0118.70.00.0373.0101.717.0237.333.9627.3457.7118.70.0
0.7950.93534.817520.727.5164.8109.8384.5549.20.00.01345.69913.8521.81153.482.40.0384.527.50.0192.20.00.0494.30.082.4164.854.91016.1604.2247.20.0
0.8450.98536.518739.00.087.429.11282.30.00.0291.42185.76819.5612.0320.6408.00.02127.40.087.4262.30.00.087.429.1174.987.4174.9670.32826.9116.658.3
0.8951.03538.214188.20.067.00.0201.1290.50.00.01050.28825.7178.7715.044.789.4603.3111.722.3156.444.70.0268.10.067.044.7223.4156.4804.4223.40.0
0.9451.08539.916250.5197.9222.60.01409.90.024.7346.31830.34328.5296.8395.7371.00.03017.649.524.7247.30.00.074.224.7222.6222.6445.2915.21385.1197.90.0
0.9951.13541.416049.30.024.849.5495.3470.60.00.02352.98643.8619.2767.8198.124.8272.40.00.0198.10.00.0198.10.049.5123.899.1396.3842.1222.90.0
1.0451.18543.312141.440.3161.10.01047.00.00.0281.91852.44389.460.4100.7120.80.01771.920.120.160.40.0100.7140.980.5281.9221.5201.4443.0684.660.40.0
1.0951.23545.017914.60.056.184.1196.2560.756.10.01598.010345.1757.0560.7252.30.01121.456.128.0112.128.00.0168.20.056.1196.256.1532.7728.9336.428.0
1.1551.29547.18427.00.013.40.026.8161.00.00.01476.14079.3147.6389.1120.8174.467.126.813.426.80.040.3120.80.080.5147.60.0603.8509.9201.30.0
1.1951.33548.412152.00.019.037.9151.7170.619.00.01194.37564.2303.3587.737.956.9606.70.056.919.00.00.0132.70.019.094.837.9436.0455.0151.70.0
1.2451.38550.114156.30.066.30.0530.00.00.00.01855.17486.7309.2463.8530.00.00.00.044.20.00.00.0198.80.0132.5176.70.01038.0839.2485.90.0
1.2951.43551.816432.70.0125.625.1276.4402.00.00.01658.37663.61281.41005.1175.9276.4452.325.175.4125.60.00.0175.925.150.375.475.41382.0879.4201.00.0
1.3451.48554.08499.60.026.10.0430.90.039.213.11266.53459.9222.0339.5443.90.039.239.20.00.00.00.0117.513.1143.6208.90.0757.3678.9248.113.1
1.3951.53558.08613.60.012.990.4129.1167.90.00.0968.52647.31007.3736.1142.190.4413.225.851.7155.012.90.0129.10.051.7155.077.5736.1619.9193.70.0
1.4451.58562.010500.716.3195.10.0666.50.00.0211.31056.63494.8455.1520.2438.997.5276.348.816.316.30.00.0211.3113.8146.3357.648.8845.3894.0373.90.0
1.4951.63565.411020.10.051.434.385.7274.234.30.0891.25021.6634.1771.2120.0222.8582.751.417.1102.817.10.085.734.385.7171.451.4976.9582.7120.00.0
1.5451.68567.112564.20.0150.90.0188.70.00.0377.31113.04263.5150.9584.8169.8150.92188.4113.2132.10.037.70.0188.7226.4132.1358.40.01245.1584.8207.50.0
1.5951.73568.812859.10.099.239.799.299.20.00.0893.06112.0773.9654.939.7337.4515.979.40.0138.919.80.0357.20.0158.8138.90.01508.2694.599.20.0
1.6451.78570.420660.366.8200.30.0400.50.066.8433.91234.97609.9200.3634.2367.1367.14772.966.833.40.033.40.0333.8233.666.8500.70.01935.9834.4200.366.8
1.6951.83572.114441.70.00.00.0257.5128.821.521.51394.85729.51094.4794.0107.3493.61137.342.90.0171.70.00.0429.221.564.4257.50.01738.2493.642.90.0
1.7451.88573.811006.80.00.00.0313.10.00.00.01104.05239.7313.1461.4395.5741.5164.849.433.0181.20.00.082.40.065.9247.216.51054.5428.498.916.5
1.7951.93575.410328.60.00.015.9222.1222.10.00.0809.13934.71364.4920.279.3634.6491.815.931.7190.415.90.031.70.0174.5111.115.9507.7380.8158.70.0
1.8451.98577.110517.00.048.80.081.397.516.30.0552.74583.91105.3633.9260.1910.3357.60.032.5146.30.00.0211.365.032.5243.832.5406.4455.1243.80.0
1.8952.03578.810760.40.016.933.867.6219.60.00.0439.24206.21959.5709.584.5946.0709.533.833.833.80.00.0287.20.0135.1101.40.0321.0354.767.60.0
1.9452.08580.510013.80.075.40.090.5181.030.20.0452.43529.01402.5708.8226.21100.9150.830.230.2181.00.00.0346.960.345.2135.790.5467.5527.8120.630.2
1.9952.13582.215918.70.049.849.849.8149.50.024.9747.46327.63114.0971.624.91220.71145.9124.60.0149.549.80.0249.124.999.6149.549.8274.0622.8249.10.0
2.0452.18584.012950.40.081.240.6121.8162.40.00.0284.23491.32415.5304.560.92029.91542.7101.50.0284.20.020.3284.2243.640.6466.920.3385.7446.6121.80.0
2.0952.23585.713355.00.00.00.0143.60.00.061.5348.74349.11743.7492.420.5574.43364.482.161.5123.10.00.0246.2143.6246.2225.70.0205.1738.5143.641.0
2.1452.28587.920648.70.0156.462.6250.3125.10.062.6219.012138.91689.4312.993.91220.11407.9125.193.962.60.093.962.6281.6187.7344.10.0406.71063.7187.70.0
2.1952.33590.312634.10.038.958.4253.1116.80.019.5292.04341.22900.6506.197.3915.0759.258.477.9155.719.50.0389.3155.7155.7175.277.9369.9642.458.40.0
2.2452.38592.715371.30.022.20.0111.2133.50.022.2578.45805.92446.9311.4311.41846.3444.966.70.0289.20.0155.7266.989.066.7178.00.01179.0934.3111.20.0
2.2952.43595.112108.50.035.30.0105.9282.40.00.0670.73618.42788.8864.9123.6706.0617.835.30.0458.90.00.0194.20.017.717.70.0706.0759.088.317.7
2.3452.48597.515490.00.00.023.3139.5139.50.00.0534.98373.01628.1162.8186.11325.7279.123.346.5209.30.00.0186.1116.30.0139.50.0976.8976.823.30.0
2.3952.53599.611460.60.017.717.7123.8106.117.735.4601.33802.52423.01521.0106.1212.2459.888.4106.1247.60.00.0212.253.153.1176.917.7654.4406.80.00.0
2.4452.585101.628414.60.00.00.0380.00.00.00.01055.515410.62153.3591.1548.92195.5633.3126.7126.7337.80.00.0380.00.0126.7548.90.01899.91899.90.00.0
2.4952.635103.611178.50.034.617.369.2138.40.00.0553.73426.22924.4899.834.6225.0605.634.634.6121.10.00.0259.617.3190.386.517.3986.3467.234.60.0
2.5452.685105.615052.10.022.222.222.2155.40.00.0310.87548.21265.4266.4244.21909.3266.488.80.00.00.00.066.60.0133.2133.288.81443.01043.40.022.2
2.5952.735107.413443.80.064.021.385.4234.70.042.7256.15078.81835.2981.6128.0298.81707.142.764.0234.70.00.0192.1149.4128.0213.442.7810.9768.264.00.0
2.6462.786109.119073.30.028.857.60.00.00.00.0230.510660.31037.2489.8201.71296.5633.986.457.6403.40.00.0288.1115.257.686.4172.91613.41527.028.80.0
2.6952.835110.89260.20.029.729.7118.9148.60.00.0118.93611.91293.21055.344.60.0698.644.629.7223.014.90.0223.059.559.5133.829.7564.8668.959.50.0
2.7452.885112.413870.30.042.142.1105.2252.60.00.0336.86672.02967.7378.9210.5315.7273.663.142.1189.40.00.0147.30.084.2126.363.1547.2926.163.121.0
2.7952.935114.19006.60.014.30.071.557.20.00.0200.13159.51615.5915.0200.10.01229.542.914.3171.642.90.071.514.328.657.214.3500.4543.342.90.0
2.8452.985115.813646.70.041.00.0163.9122.920.50.0122.97028.32602.3594.2143.4102.5450.861.541.0368.80.00.0102.520.50.0122.920.5553.2881.120.561.5
2.8953.035117.410753.90.0115.633.066.1396.516.50.0264.33138.62031.81222.466.10.01305.033.082.6346.933.00.0115.6198.233.0181.733.0479.1545.116.50.0
2.9453.085119.118203.80.00.00.0163.8272.90.00.0409.410125.42456.3409.4245.60.01446.554.681.9327.50.00.0218.327.30.0191.054.6436.71228.154.60.0
2.9953.135120.813182.10.0146.220.941.8167.10.00.0167.14073.72214.41169.9104.50.03133.662.741.8188.00.00.0125.3104.583.6125.341.8355.1710.3104.50.0
3.0453.185123.026367.90.039.879.50.079.50.0119.3517.010817.63022.6318.2715.90.06641.7198.9119.3437.50.0238.6318.2238.6119.3119.30.0517.01630.679.50.0
3.0953.235125.616916.90.025.851.7103.325.80.0103.3129.14313.21885.4826.5180.80.06353.5232.40.0309.90.00.0206.6206.651.7284.10.0594.01033.10.00.0
3.1453.285128.224405.10.0112.637.5112.60.00.00.0150.29048.72177.7337.9375.50.07884.7187.775.1187.70.075.1300.4225.3262.8450.60.0713.41689.60.00.0
3.1953.335130.86841.70.022.50.056.445.10.00.0112.73471.6743.9563.667.60.0597.456.456.4180.30.00.045.10.011.3180.311.3157.8450.90.011.3
3.2453.385133.411305.40.00.022.545.00.00.00.00.08608.3337.1292.289.90.0606.822.50.0292.222.50.00.00.00.00.00.0112.4786.767.40.0
3.2953.435136.23681.10.00.00.011.80.00.00.023.62489.4389.3188.859.00.047.247.211.811.80.00.035.40.00.023.60.0153.4165.20.023.6
3.3453.485138.710500.70.016.316.3130.097.50.00.032.57201.0861.5617.7227.60.0243.832.5113.897.50.00.016.30.016.397.50.0146.3503.90.032.5
3.3953.535141.59420.80.015.015.0150.0195.00.00.0405.03930.31350.11245.1195.00.0120.015.0120.0465.00.00.015.00.060.060.00.0495.0570.00.00.0
3.4453.585144.218904.20.059.2147.9473.359.20.00.0236.77573.52485.11065.0621.30.03283.859.229.6562.10.00.0147.90.088.8177.559.2680.41035.459.20.0
3.4953.635146.76635.80.00.00.064.7107.90.00.053.93118.31262.4712.1259.00.0107.910.843.2107.910.80.010.80.010.897.10.0356.1269.732.40.0
3.5453.685149.512225.20.017.90.0107.671.70.00.0197.25951.32258.6555.7286.817.9394.453.817.9340.60.035.9125.50.053.8233.017.9950.1501.935.90.0
3.5953.735151.54535.00.018.418.446.1119.89.20.0156.71419.5783.5672.9119.80.0239.736.918.492.20.09.273.79.218.483.00.0368.7202.89.29.2
3.6453.785153.318036.20.055.20.0275.8165.555.20.0165.59211.23474.9579.1275.80.01075.682.70.0303.40.00.0193.082.755.2137.9137.9854.9854.90.00.0