Benthic foraminifera in Southwest Indian Ocean surface sediments ...

• Main Author: Corliss, Bruce H
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 1983
• Subjects: Gravity corer; Piston corer; DODO; LUSIAD-A; LUSIAD-H; MONSOON; RC11; RC14; RC17; V16; V18; V20; V24; V29; Argo; Horizon; Robert Conrad; Vema; Antarc*; Antarctic; North Atlantic Deep Water; North Atlantic
• Online Access: https://dx.doi.org/10.1594/pangaea.777974; https://doi.pangaea.de/10.1594/PANGAEA.777974

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 ...