Not logged in
PANGAEA.
Data Publisher for Earth & Environmental Science

Gupta, Anil K; Sundar Raj, M; Mohan, Kuppusamy; De, Soma (2008): Relative abundances of twenty-eight dominant benthic foraminifera species of DSDP Hole 23-219 (Table 1s) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.706066, Supplement to: Gupta, AK et al. (2008): A major change in monsoon-driven productivity in the tropical Indian Ocean during ca 1.2-0.9 Myr: Foraminiferal faunal and stable isotope data. Palaeogeography, Palaeoclimatology, Palaeoecology, 261(3-4), 234-245, https://doi.org/10.1016/j.palaeo.2008.01.012

Always quote citation above when using data! You can download the citation in several formats below.

RIS CitationBibTeX CitationShow MapGoogle Earth

Abstract:
Tropical climate is variable on astronomical time scale, driving changes in surface and deep-sea fauna during the Pliocene-Pleistocene. To understand these changes in the tropical Indian Ocean over the past 2.36 Myr, we quantitatively analyzed deep-sea benthic foraminifera and selected planktic foraminifera from >125 µm size fraction from Deep Sea Drilling Project Site 219. The data from Site 219 was combined with published foraminiferal and isotope data from Site 214, eastern Indian Ocean to determine the nature of changes. Factor and cluster analyses of the 28 highest-ranked species distinguished four biofacies, characterizing distinct deep-sea environmental settings. These biofacies have been named after their most dominant species such as Stilostomella lepidula-Pleurostomella alternans (Sl-Pa), Nuttallides umbonifer-Globocassidulina subglobosa (Nu-Gs), Oridorsalis umbonatus-Gavelinopsis lobatulus (Ou-Gl) and Epistominella exigua-Uvigerina hispido-costata (Ee-Uh) biofacies. Biofacies Sl-Pa ranges from ~2.36 to 0.55 Myr, biofacies Nu-Gs ranges from ~1.9 to 0.65 Myr, biofacies Ou-Gl ranges from ~1 to 0.35 Myr and biofacies Ee-Uh ranges from 1.1 to 0.25 Myr. The proxy record indicates fluctuating tropical environmental conditions such as oxygenation, surface productivity and organic food supply. These changes appear to have been driven by changes in monsoonal wind intensity related to glacial-interglacial cycles. A shift at ~1.2-0.9 Myr is observed in both the faunal and isotope records at Site 219, indicating a major increase in monsoon-induced productivity. This coincides with increased amplitude of glacial cycles, which appear to have influenced low latitude monsoonal climate as well as deep-sea conditions in the tropical Indian Ocean.
Project(s):
Coverage:
Latitude: 9.029200 * Longitude: 72.877800
Date/Time Start: 1972-03-10T00:00:00 * Date/Time End: 1972-03-10T00:00:00
Minimum Elevation: -1764.0 m * Maximum Elevation: -1764.0 m
Event(s):
23-219 * Latitude: 9.029200 * Longitude: 72.877800 * Date/Time: 1972-03-10T00:00:00 * Elevation: -1764.0 m * Penetration: 273 m * Recovery: 172.8 m * Location: Indian Ocean/Arabian Sea/RIDGE * Campaign: Leg23 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 27 cores; 235 m cored; 0 m drilled; 73.5 % recovery
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1Sample code/labelSample labelGupta, Anil KDSDP/ODP/IODP sample designation
2Astrononion umbilicatulumA. umbilicatulum%Gupta, Anil KCounting >125 µm fraction
3Bolivina pseudoplicataB. pseudoplicata%Gupta, Anil KCounting >125 µm fraction
4Bolivina pusillaB. pusilla%Gupta, Anil KCounting >125 µm fraction
5Bulimina aculeataB. aculeata%Gupta, Anil KCounting >125 µm fraction
6Bulimina alazanensisB. alazanensis%Gupta, Anil KCounting >125 µm fraction
7Bulimina striataB. striata%Gupta, Anil KCounting >125 µm fraction
8Cassidulina carinataC. carinata%Gupta, Anil KCounting >125 µm fraction
9Cibicides bradyiC. bradyi%Gupta, Anil KCounting >125 µm fraction
10Cibicides wuellerstorfiC. wuellerstorfi%Gupta, Anil KCounting >125 µm fraction
11Discopulvinulina berthelotiD. bertheloti%Gupta, Anil KCounting >125 µm fraction
12Eggerella bradyiE. bradyi%Gupta, Anil KCounting >125 µm fraction
13Ehrenbergina carinataE. carinata%Gupta, Anil KCounting >125 µm fraction
14Epistominella exiguaE. exigua%Gupta, Anil KCounting >125 µm fraction
15Evolvocassidulina bradyiiE. bradyii%Gupta, Anil KCounting >125 µm fraction
16Gavelinopsis lobatulusG. lobatulus%Gupta, Anil KCounting >125 µm fraction
17Globocassidulina pacificaG. pacifica%Gupta, Anil KCounting >125 µm fraction
18Globocassidulina subglobosaG. subglobosa%Gupta, Anil KCounting >125 µm fraction
19Gyroidinoides cibaoensisG. cibaoensis%Gupta, Anil KCounting >125 µm fraction
20Hoeglundina elegansH. elegans%Gupta, Anil KCounting >125 µm fractionHoglandulina elegans
21Melonis barleeanusM. barleeanus%Gupta, Anil KCounting >125 µm fraction
22Nuttallides umboniferaN. umbonifera%Gupta, Anil KCounting >125 µm fraction
23Oridorsalis umbonatusO. umbonatus%Gupta, Anil KCounting >125 µm fraction
24Osangularia culterO. culter%Gupta, Anil KCounting >125 µm fraction
25Pleurostomella alternansP. alternans%Gupta, Anil KCounting >125 µm fraction
26Pullenia bulloidesP. bulloides%Gupta, Anil KCounting >125 µm fraction
27Stilostomella lepidulaS. lepidula%Gupta, Anil KCounting >125 µm fraction
28Uvigerina hispidocostataU. hispidocostata%Gupta, Anil KCounting >125 µm fraction
29Uvigerina proboscideaU. proboscidea%Gupta, Anil KCounting >125 µm fraction
Size:
2059 data points

Download Data

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

View dataset as HTML (shows only first 2000 rows)