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Baumann, Karl-Heinz (2026): Calcareous nannofossil assemblages in sediment core GeoB2908-7 [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.993418 (DOI registration in progress)

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Published: 2026-04-07

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Abstract:
The calcareous nannofossil assemblages from sediment core GeoB2908-7 from the equatorial Atlantic were examined to document oceanographic changes in surface waters during the last 365 ka. Coccolith counts were made manually on filtered samples using a Zeiss DSM 940A scanning electron microscope at 3,000x or 5,000x magnification. The surface water circulation of the equatorial Atlantic has changed drastically, as can be seen from changes in the coccolithophore species composition and absolute coccolith abundances.
Keyword(s):
coccolith abundances; Coccoliths; Equatorial Atlantic
Coverage:
Latitude: 0.106667 * Longitude: -23.326667
Date/Time Start: 1994-08-24T00:00:00 * Date/Time End: 1994-08-24T00:00:00
Minimum DEPTH, sediment/rock: 0.03 m * Maximum DEPTH, sediment/rock: 10.73 m
Event(s):
GeoB2908-7 * Latitude: 0.106667 * Longitude: -23.326667 * Date/Time: 1994-08-24T00:00:00 * Elevation: -3809.0 m * Recovery: 10.94 m * Location: Western Equatorial Atlantic * Campaign: M29/3 * Basis: Meteor (1986) * Method/Device: Gravity corer (Kiel type) (SL)
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
DEPTH, sediment/rockDepth sedmBaumann, Karl-HeinzGeocode
AGEAgeka BPBaumann, Karl-HeinzGeocode
Coccoliths, totalCocco106 #/gBaumann, Karl-HeinzScanning electron microscope (SEM), Zeiss, DSM 940A
Calciosolenia spp.Calciosolenia spp.106 #/gBaumann, Karl-HeinzScanning electron microscope (SEM), Zeiss, DSM 940A
Calcidiscus leptoporusC. leptoporus106 #/gBaumann, Karl-HeinzScanning electron microscope (SEM), Zeiss, DSM 940A
Coccolithus braarudiiC. braarudii106 #/gBaumann, Karl-HeinzScanning electron microscope (SEM), Zeiss, DSM 940A
Emiliania huxleyiE. huxleyi106 #/gBaumann, Karl-HeinzScanning electron microscope (SEM), Zeiss, DSM 940A
Florisphaera profundaF. profunda106 #/gBaumann, Karl-HeinzScanning electron microscope (SEM), Zeiss, DSM 940A
Gephyrocapsa caribbeanicaG. caribbeanica106 #/gBaumann, Karl-HeinzScanning electron microscope (SEM), Zeiss, DSM 940A
10 Gephyrocapsa ericsoniiG. ericsonii106 #/gBaumann, Karl-HeinzScanning electron microscope (SEM), Zeiss, DSM 940A
11 Gephyrocapsa muelleraeG. muellerae106 #/gBaumann, Karl-HeinzScanning electron microscope (SEM), Zeiss, DSM 940A
12 Gephyrocapsa oceanicaG. oceanica106 #/gBaumann, Karl-HeinzScanning electron microscope (SEM), Zeiss, DSM 940A
13 Gladiolithus flabellatusG. flabellatus106 #/gBaumann, Karl-HeinzScanning electron microscope (SEM), Zeiss, DSM 940A
14 Hayaster perplexusH. perplexus106 #/gBaumann, Karl-HeinzScanning electron microscope (SEM), Zeiss, DSM 940A
15 Helicosphaera carteriH. carteri106 #/gBaumann, Karl-HeinzScanning electron microscope (SEM), Zeiss, DSM 940A
16 Oolithotus fragilisO. fragilis106 #/gBaumann, Karl-HeinzScanning electron microscope (SEM), Zeiss, DSM 940A
17 Reticulofenestra sessilisR. sessilis106 #/gBaumann, Karl-HeinzScanning electron microscope (SEM), Zeiss, DSM 940A
18 Rhabdosphaera clavigeraR. clavigera106 #/gBaumann, Karl-HeinzScanning electron microscope (SEM), Zeiss, DSM 940A
19 Rhabdosphaera spp.Rhabdosphaera spp.106 #/gBaumann, Karl-HeinzScanning electron microscope (SEM), Zeiss, DSM 940A
20 Syracosphaera pulchraS. pulchra106 #/gBaumann, Karl-HeinzScanning electron microscope (SEM), Zeiss, DSM 940A
21 Syracosphaera spp.Syracosphaera spp.106 #/gBaumann, Karl-HeinzScanning electron microscope (SEM), Zeiss, DSM 940A
22 Umbilicosphaera hulburtianaU. hulburtiana106 #/gBaumann, Karl-HeinzScanning electron microscope (SEM), Zeiss, DSM 940A
23 Umbilicosphaera sibogaeU. sibogae106 #/gBaumann, Karl-HeinzScanning electron microscope (SEM), Zeiss, DSM 940A
24 Umbellosphaera irregularisU. irregularis106 #/gBaumann, Karl-HeinzScanning electron microscope (SEM), Zeiss, DSM 940A
25 Umbellosphaera tenuisU. tenuis106 #/gBaumann, Karl-HeinzScanning electron microscope (SEM), Zeiss, DSM 940A
26 Coccoliths, otherCocco oth106 #/gBaumann, Karl-HeinzScanning electron microscope (SEM), Zeiss, DSM 940A
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
2184 data points

Data

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


Depth sed [m]

Age [ka BP]

Cocco [106 #/g]

Calciosolenia spp. [106 #/g]

C. leptoporus [106 #/g]

C. braarudii [106 #/g]

E. huxleyi [106 #/g]

F. profunda [106 #/g]

G. caribbeanica [106 #/g]
10 
G. ericsonii [106 #/g]
11 
G. muellerae [106 #/g]
12 
G. oceanica [106 #/g]
13 
G. flabellatus [106 #/g]
14 
H. perplexus [106 #/g]
15 
H. carteri [106 #/g]
16 
O. fragilis [106 #/g]
17 
R. sessilis [106 #/g]
18 
R. clavigera [106 #/g]
19 
Rhabdosphaera spp. [106 #/g]
20 
S. pulchra [106 #/g]
21 
Syracosphaera spp. [106 #/g]
22 
U. hulburtiana [106 #/g]
23 
U. sibogae [106 #/g]
24 
U. irregularis [106 #/g]
25 
U. tenuis [106 #/g]
26 
Cocco oth [106 #/g]
0.032.6039773.3131.52826.90.013279.712885.20.0591.70.065.7525.9131.5394.42103.7525.9460.2131.5197.2394.4525.91577.82366.7460.2197.2
0.135.1655018.4433.92516.60.012843.422823.10.0781.0173.6694.21822.486.8433.92690.2954.61041.486.8173.61301.7520.71822.42777.0694.2347.1
0.186.4456012.4177.03981.988.519113.212388.20.0973.4265.52212.22123.70.0530.94866.8619.4177.00.0884.9973.4442.42389.22743.1619.4442.4
0.2812.0030772.10.01770.30.06612.611663.20.0572.7781.01822.4416.50.0520.72082.7364.5260.30.0156.2104.1572.71457.91301.7260.352.1
0.3813.9330155.4286.91591.20.06156.310747.40.01643.478.33547.7417.478.3391.31278.2365.2208.778.3182.6156.5391.31643.4808.7104.30.0
0.4815.8717262.834.91953.0209.22789.93557.20.0732.4279.02999.2174.40.0209.21987.8139.569.70.0209.234.9279.01255.5244.134.969.7
0.6318.9328389.6108.22595.6324.54758.67462.40.01730.4648.93731.2486.70.0216.31406.0270.454.10.0594.854.1270.42433.4811.1162.2270.4
0.7321.2031781.2190.7699.20.07627.511314.10.02669.6190.71144.1762.70.063.61398.4317.8190.7190.7317.8317.8381.43051.0508.5317.8127.1
0.8323.4728525.597.23401.70.06074.47678.10.01555.1680.31555.10.00.0437.42138.2437.497.20.0340.20.0874.72381.2534.5243.00.0
0.9826.8726129.50.04260.70.03217.38391.00.01260.8304.32695.687.00.087.01304.3652.2173.90.0217.487.0652.22043.4434.8260.90.0
1.0829.5633846.665.26358.50.04662.99847.50.01923.8195.63489.0423.90.0163.02054.3489.10.00.097.8130.4782.62282.5489.1326.165.2
1.1331.1346754.20.010936.1100.36722.210635.10.02708.9702.34113.6200.70.0301.04113.6301.0100.30.0903.0100.3802.63110.3602.00.0301.0
1.2334.2535357.6261.97660.80.06416.79363.20.03011.9261.91767.9327.4196.4261.92095.3392.9131.00.0131.0131.0392.91898.8327.4327.40.0
1.3337.3830836.165.63149.20.04789.410956.70.02165.1328.02099.5196.8196.8262.42493.1262.4393.70.0262.4131.2787.31181.0459.3524.9131.2
1.4340.5039226.00.06115.10.09769.210440.40.02088.1298.32610.1223.70.0223.72460.9522.0298.30.0447.474.6820.31789.8745.7149.1149.1
1.5343.6330781.565.24173.80.05217.211217.00.03521.665.21826.0260.90.065.21760.8456.565.20.0260.965.2391.3913.0391.365.20.0
1.6848.3129090.1126.84373.0126.87922.15387.10.02535.1570.41774.6633.80.0126.81267.5507.0126.80.0443.6253.5190.11901.3570.4190.163.4
1.7851.4453456.4180.98140.690.59768.712482.290.56512.5904.53889.4542.70.0361.82261.3723.690.50.0633.2271.4633.23075.31989.9633.2180.9
1.8854.5066039.3103.08757.2206.111229.816793.10.07726.91030.34224.0721.20.0515.12678.71339.3103.00.0721.2515.1824.24327.12678.7927.2618.2
1.9857.5052528.5314.56186.0104.811009.014993.20.05976.3524.22621.2419.40.0104.81363.0838.8104.80.0209.7209.7629.13460.01782.41467.9209.7
2.0862.0031685.30.02635.00.05006.412647.80.03425.4461.11185.7527.00.0329.4461.1461.1197.60.0263.565.9922.22173.8461.1395.265.9
2.2366.7142077.50.02866.60.010749.711261.60.03071.4819.01330.91330.90.0204.81433.31023.8102.40.0307.1102.4409.54299.92149.9204.8409.5
2.3368.4340469.40.01718.40.05928.613060.20.05585.0429.62921.4343.70.0257.81031.1687.4429.60.0343.785.9343.76787.9343.785.985.9
2.4370.1443837.50.04961.00.09651.59922.10.04419.8721.63157.0360.80.0631.41713.8811.80.00.0360.80.0451.04870.81262.8451.090.2
2.5372.1335093.30.02924.40.05848.97164.90.07164.9731.11681.6438.7438.7511.81169.81169.8219.30.0584.9219.3365.63216.9804.2438.70.0
2.6374.3849092.10.02467.40.02552.416931.20.015484.9680.72297.2935.9425.4680.71616.6170.2170.20.085.1170.2595.62977.9425.4255.2170.2
2.7376.6347437.0172.21635.80.02927.119112.50.013430.4430.51463.61205.386.1344.41463.6430.586.186.1516.6258.3516.62324.5344.4602.60.0
2.8378.8895231.30.03455.10.012092.924833.50.033903.21511.61079.71511.60.01295.72375.42159.4431.90.01295.71079.71295.73239.22159.4647.8863.8
2.9382.334302.00.0493.2109.6328.81397.527.482.2246.6301.482.20.0164.4219.20.027.40.027.40.027.4109.60.00.0657.6
2.9884.6749916.10.01944.80.02204.123726.40.012187.3129.71944.8648.3259.3777.91166.9648.3129.7259.3259.3129.7648.31426.2648.3518.6259.3
3.0889.0070947.1324.53244.5216.34866.813518.90.032986.11297.82379.3540.80.0757.12811.9865.20.0216.3648.9216.3757.13136.41514.1108.2540.8
3.1391.0060721.9256.84749.90.02695.913864.60.024263.1256.83851.3770.30.0641.91925.6898.6385.10.0641.9256.8770.33209.4898.6385.10.0
3.2395.0056870.6128.42695.90.02567.516688.90.024776.6513.52310.8898.60.00.01283.8513.5385.10.00.0128.4256.82439.1770.3256.8256.8
3.3399.0037850.385.2682.00.01705.010315.10.019436.6255.7767.2341.0170.50.01023.0511.50.00.00.0255.7170.51705.0341.085.20.0
3.43101.5582650.70.03853.20.04238.524275.00.030247.5963.32311.9770.60.0578.04431.2770.6578.00.00.0963.3578.03467.93275.2192.71156.0
3.53105.1859833.90.02562.50.01921.924471.70.017681.1512.52178.1384.4640.6256.22946.81025.00.0128.10.0128.1896.92562.51153.1384.40.0
3.63108.6743735.00.02238.40.01291.418768.20.010589.4172.22324.5602.6172.2516.61205.3860.986.1172.2344.4172.2258.32324.5947.0344.4344.4
3.73112.0056076.60.04361.50.04257.710592.30.020249.9623.13219.2415.40.0519.23634.6623.1103.80.0415.4311.51038.54776.9207.7311.5415.4
3.83115.3343734.585.93608.70.02405.811427.70.014778.6257.82577.7343.7343.7515.51890.3515.50.00.0171.8171.8257.83436.9601.5257.885.9
3.93118.6755953.70.02572.60.05531.116335.90.019808.9514.51286.3385.9385.9514.52701.2385.9128.6128.6257.3128.6257.32829.8900.4643.1257.3
3.98120.3366223.50.02129.00.06387.020954.00.017368.3896.41008.5448.20.0784.44930.31008.5112.10.0784.4112.11008.54258.02689.3448.2896.4
4.03122.0061492.1256.81925.60.02695.929783.30.012067.4385.12054.0770.3128.4256.82182.41797.3256.8128.4641.9641.9770.32182.41412.1513.5641.9
4.13126.0027284.2118.6830.40.01304.97770.1237.36168.6533.82787.7118.60.0533.81720.1711.859.30.0593.1118.6474.52194.6474.5237.3296.6
4.18128.0038922.8343.71202.90.01976.213489.80.08162.61202.94382.0601.5429.6687.4687.41202.90.085.9601.5343.7257.81718.4859.2343.7343.7
4.28131.5057810.2259.81818.70.02858.021825.00.011432.1259.85716.1649.6649.61299.1779.51299.1129.9129.9259.8649.6389.74936.61429.0389.7649.6
4.38135.0054526.2216.42380.10.03786.511035.10.010926.9540.99736.8432.70.0324.63137.41298.2216.40.0216.4108.21190.16274.81622.8540.9540.9
4.53138.6730301.9125.52384.00.01380.24517.1439.29347.81317.54454.3188.20.0125.5690.1188.20.00.0627.4188.2815.63136.8313.762.70.0
4.63141.1144928.80.02733.30.02220.813068.60.012727.01025.05039.5854.285.485.41537.5683.3256.2170.8256.2512.5256.22391.6256.2341.7427.1
4.78144.7836629.0193.8969.00.01162.88075.2258.414147.71292.03488.5129.20.0452.21292.0452.2258.40.0258.464.6452.22842.5516.8193.8129.2
4.98149.0031893.5317.3317.30.0476.09203.10.012693.9952.01428.1476.0476.0396.7555.4317.3317.30.0396.7396.779.32538.8158.7396.70.0
5.08151.0027120.7104.5836.10.0365.87890.60.08674.41515.42142.5156.8104.5418.0992.9679.352.30.0104.5209.0418.02090.2156.8156.852.3
5.18154.6429458.6288.8982.00.0404.38491.00.09357.41559.62079.4173.3115.5404.3982.0693.1173.357.8231.0288.8404.32195.0173.3173.3231.0
5.38161.9131890.0239.21355.30.01195.99008.979.712357.4717.51674.279.70.0398.6717.5717.5318.9159.5398.6159.5239.21594.5318.9159.50.0
5.48165.5531551.7310.51428.50.01242.28074.20.09937.5434.81801.2186.30.0186.31180.1869.5124.2124.2310.562.1869.52484.4496.9372.71055.9
5.63171.0031357.1320.61474.90.01731.48785.10.010003.5128.21987.964.10.064.11090.1769.50.064.1256.5192.4833.62629.1577.1384.70.0
5.73179.0032297.0248.41863.30.01490.67763.70.09316.4310.53726.662.10.0124.21242.2621.10.00.0186.362.1993.82484.4559.0310.5931.6
5.93185.2533194.3279.42291.20.01229.44917.755.97600.0502.99779.50.00.0223.51229.4447.10.00.0111.8167.61173.52347.1502.9167.6167.6
6.08187.3328700.9156.32396.10.0781.36771.50.05208.9416.77709.1156.3104.2156.31093.9208.4104.20.0104.20.01198.01771.0312.552.10.0
6.28190.0022770.379.91278.30.0519.36631.40.05393.0399.53994.879.90.0239.71078.6439.4119.879.90.0159.8519.31478.1159.839.979.9
6.38191.3334011.10.02545.90.0522.29922.60.010706.0783.43459.965.3195.8326.41436.2783.4195.8130.665.365.3587.51762.6261.1195.80.0
6.48192.6745466.20.01667.70.0438.912727.0438.914306.91492.15003.0614.40.0175.52369.9526.6175.50.0263.3438.9790.03423.1175.5351.187.8
6.63197.6718346.054.51089.60.0651.22451.70.03245.81198.65720.6272.4109.0163.41035.2217.954.50.054.511.2381.41307.654.5109.0163.4
6.78207.209290.50.0580.70.0108.9834.7181.5653.2798.45262.236.336.3181.5108.936.30.00.036.30.0181.5254.00.00.00.0
6.88211.6021346.054.3652.20.0327.03858.60.06745.11358.64945.5163.054.3217.4923.9434.80.00.054.3108.7380.4869.554.354.389.6
6.98216.0046500.5163.4980.70.0326.912095.00.018959.82288.23023.8490.3163.4245.22288.21307.60.0245.2163.4245.2735.51961.4326.9245.2245.2
7.13223.2032869.2139.61046.80.0279.19490.90.011165.81674.92931.0279.169.8348.91116.6418.7139.60.069.8209.4628.12163.4279.1279.1139.6
7.23228.0037972.5123.71113.20.0185.58225.3309.213482.11422.46060.8309.2123.7494.81360.6989.5185.50.0123.70.01051.41793.5556.661.80.0
7.38230.7332304.5210.8632.40.0105.48695.30.07377.91054.07009.0263.50.0316.21054.0527.00.0158.1158.1210.81475.62318.8158.1210.8368.9
7.63235.2735008.9189.61832.60.0126.47140.8442.412385.81769.44802.7189.663.2252.81516.6505.5126.463.20.0252.8947.92148.6126.4126.40.0
7.78238.0033298.4202.21348.167.4539.28762.7404.49234.61011.12696.2606.7134.8337.01550.3808.9134.867.4202.2202.21415.52831.0134.8269.6337.0
8.03246.6043686.7420.11050.20.0210.08086.21155.211971.83150.57981.2525.10.0630.11260.2630.1105.0105.0210.0210.02205.32940.5420.1420.10.0
8.23251.0045629.0573.92008.80.0430.58035.31076.214922.73228.56313.4287.0143.5430.51434.91578.4143.50.0143.5573.91291.42582.871.7358.70.0
8.38257.0048619.1133.61669.60.0467.59283.0801.414892.92137.18414.8267.166.8267.12938.51602.8133.666.8133.6534.31803.22471.0133.6333.966.8
8.48261.0045592.2145.91313.10.0364.79264.31458.913860.03647.46200.5437.772.9145.92188.41313.1145.972.9145.9437.71604.82334.3145.9145.9145.9
8.58265.0044206.2262.6875.40.0350.19979.22363.513305.65689.93063.8700.387.50.01225.51050.4262.6175.1175.1437.71575.72363.5262.60.00.0
8.73271.2531943.4128.01088.30.0512.15313.23840.98770.03840.93200.7192.00.064.0768.2896.264.064.0128.0320.1960.21600.4128.00.064.0
8.88278.0028776.456.81248.70.0510.83802.85846.16754.22837.93121.7170.30.0283.8908.1794.60.0113.556.8283.8681.11078.4113.556.856.8
9.03284.7556023.0193.5677.30.0387.09192.011611.011901.312675.31354.6387.096.80.02322.21161.10.00.0387.0193.51354.61644.9387.096.80.0
9.13290.0042825.9195.3781.00.0130.26899.06183.19697.610608.81301.7585.8130.2195.31106.41366.8130.2130.2195.3325.4911.21562.0130.2260.30.0
9.23296.0040103.0254.6700.20.00.06047.36429.27129.410503.22291.6636.663.7127.3954.81273.10.063.7191.0191.0954.81591.4191.0254.6254.6
9.38301.4037254.9302.3377.80.00.04005.18690.35592.09823.82796.0151.10.0151.1906.81586.90.00.0302.3151.1755.71284.7226.775.675.6
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