Distribution of benthic foraminifera in DSDP Hole 24-238 in the Central Indian Ocean (Appendix A)
Citation
Gupta A K, Sarkar S, Mukherjee B (2006). Distribution of benthic foraminifera in DSDP Hole 24-238 in the Central Indian Ocean (Appendix A). PANGAEA - Publishing Network for Geoscientific and Environmental Data. Occurrence dataset https://doi.org/10.1594/pangaea.691485 accessed via GBIF.org on 2021-05-11.Description
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.Taxonomic Coverages
Geographic Coverages
Bibliographic Citations
Contacts
Anil K Guptaoriginator
Sudipta Sarkar
originator
Baidehi Mukherjee
originator
metadata author
PANGAEA - Data Publisher for Earth & Environmental Science
email: info@pangaea.de
homepage: https://www.pangaea.de
administrative point of contact
PANGAEA - Data Publisher for Earth & Environmental Science
email: info@pangaea.de
homepage: http://www.pangaea.de