(Table DR1) Biofacies, percentages of important benthic foraminifera and isotope data at ODP Site 758
Citation
Gupta A K, Thomas E (2003). (Table DR1) Biofacies, percentages of important benthic foraminifera and isotope data at ODP Site 758. PANGAEA - Data Publisher for Earth & Environmental Science. Occurrence dataset https://doi.org/10.1594/pangaea.713682 accessed via GBIF.org on 2024-11-04.Description
The Indian monsoon system, as recorded by ocean-floor biota (benthic foraminifera) at Ocean Drilling Program Site 758 in the eastern equatorial Indian Ocean, has varied dramatically over the past 5.5 m.y., long after the onset of the monsoons at 10-8 Ma. Benthic foraminifera that thrive with high productivity year-round were common before the formation of Northern Hemisphere continental ice sheets ca. 3.1-2.5 Ma, indicating that the summer (southwest) monsoon had high intensity and long seasonal duration. Ca. 2.8 Ma benthic faunas became dominated by taxa that flourish with a seasonally strongly fluctuating food supply, indicating that the northeast (winter) monsoon, during which primary productivity is relatively low, increased in duration and strength to form a system similar to that of today. The change occurred coeval with the initiation of the Northern Hemisphere glaciation, documenting a close link between the development of the Indian monsoon and Northern Hemisphere glaciation.Taxonomic Coverages
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Chromistarank: kingdom
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Foraminiferarank: kingdom
Geographic Coverages
Event: 121-758,
Indian Ocean
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Bibliographic Citations
Contacts
Anil K Guptaoriginator
Ellen Thomas
originator
metadata author
PANGAEA - Data Publisher for Earth & Environmental Science
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