Benthic foraminifera in Southwest Indian Ocean surface sediments ...
The distribution of deep-sea benthonic foraminifera in core top samples from the southwest Indian Ocean is examined. Principal component analysis reveals two major assemblages. One assemblages between 3600 and 4800-m water depth is dominated by Episominella umbonifera and is associated with cold (Th...
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| Format: | Article in Journal/Newspaper |
| Language: | English |
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PANGAEA
1983
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| Online Access: | https://dx.doi.org/10.1594/pangaea.777974 https://doi.pangaea.de/10.1594/PANGAEA.777974 |
| Summary: | The distribution of deep-sea benthonic foraminifera in core top samples from the southwest Indian Ocean is examined. Principal component analysis reveals two major assemblages. One assemblages between 3600 and 4800-m water depth is dominated by Episominella umbonifera and is associated with cold (Theta = -0.3 to 0.8°C), low salinity (34.66 to 34.72 * 10**-3) Antarctic Bottom Water in the Crozet Basin, in fracture zones, and on the flanks of the Southwest Indian Ridge. A second assemblage, dominated by Planulina wuellerstorfi, Globocassidulina subglobasa, Astrononion echolsi and Pullenia bulloides, is between 1600 and 3800 m on the Crozet Plateau, Madagascar Ridge, Central Indian Ridge, and Southwest Indian Ridge and is associated with relatively warm (Theta = 0.8 to 2.6°C), high salinity (34.72 to 34.76 * 10**-3) North Atlantic Deep Water. The third principal component divides the P. wuellerstorfi assemblage into two subgroups. One is dominated by Epistominella exigua, P. bulloides, P. wuellerstorfi, and A. ... : Supplement to: Corliss, Bruce H (1983): Distribution of Holocene deep-sea benthonic foraminifera in the southwest Indian Ocean. Deep Sea Research Part I: Oceanographic Research Papers, 30(2), 95-117 ... |
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