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Stein, Ruediger; Sarnthein, Michael (2004): Stable isotope ratios of benthic foraminifera from DSDP Hole 79-544B (Table 1). PANGAEA, https://doi.org/10.1594/PANGAEA.267747, Supplement to: Stein, R; Sarnthein, M (1984): Late Neogene oxygen-isotope stratigraphy and flux rates of terrigenous sediments at Hole 544B off Marocco. In: Hinz, K & Winterer, E L et al. (eds.) Initial Reports of the Deep Sea Drilling Project, U.S. Government Printing Office, Washington, D.C., LXXIX, 385-394, https://doi.org/10.2973/dsdp.proc.79.109.1984

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Abstract:
At DSDP Hole 544B, oxygen-isotope stratigraphy, carbonate proportion, clay mineralogy, and (terrigenous) grain sizes show short-term (Milankovitch-type) sediment cycles from 5.1 m.y. to the present and fairly uniform conditions of deposition before this date. The cycles are superimposed by two large-scale shifts of sediment composition and flux parallel to distinct changes of the average benthos delta18O composition (up to 0.7‰). The shifts coincide with major hiatuses from 1.05 to 1.65 and from 2.4 to 4.5 m.y. and can be correlated with specific events of the global climatic evolution. The marked increase in the proportion of chlorite and in the grain-sizes of terrigenous matter near 2.4 m.y. may reflect increased physical weathering and denudation of the Atlas Mountains and the lowering of sea level. These hiatuses were probably formed by strengthened contour currents that also may have caused the reduction of both terrigenous and calcium-carbonate flux rates during the Brunhes Magnetic Epoch.
Related to:
Stein, Ruediger (1984): Zur neogenen Klimaentwicklung in Nordwest-Afrika und Paläo-Ozeanographie im Nordost-Atlantik - Ergebnisse von DSDP-Sites 141, 366, 397 und 544B. Berichte-Reports, Geologisch-Paläontologisches Institut der Universität Kiel, 4, 210 pp, https://doi.org/10.2312/reports-gpi.1984.4
Project(s):
Coverage:
Latitude: 33.766700 * Longitude: -9.405000
Date/Time Start: 1981-04-17T00:00:00 * Date/Time End: 1981-04-17T00:00:00
Minimum DEPTH, sediment/rock: 0.07 m * Maximum DEPTH, sediment/rock: 39.26 m
Event(s):
79-544B * Latitude: 33.766700 * Longitude: -9.405000 * Date/Time: 1981-04-17T00:00:00 * Elevation: -3581.0 m * Penetration: 39.3 m * Recovery: 36.8 m * Location: North Atlantic/PLATEAU * Campaign: Leg79 * Basis: Glomar Challenger * Device: Drilling/drill rig (DRILL) * Comment: 12 cores; 39.3 m cored; 0 m drilled; 93.6 % recovery
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethodComment
1DEPTH, sediment/rockDepthmGeocode
2Sample code/labelSample labelStein, RuedigerODP sample designation
3Pyrgo murrhina, d18OP. murrhina d18Oper mil PDBStein, RuedigerMass spectrometer VG Micromass 602
4Pyrgo murrhina, d13CP. murrhina d13Cper mil PDBStein, RuedigerMass spectrometer VG Micromass 602
5Cibicidoides wuellerstorfi, d18OC. wuellerstorfi d18Oper mil PDBStein, RuedigerMass spectrometer VG Micromass 602
6Cibicidoides wuellerstorfi, d13CC. wuellerstorfi d13Cper mil PDBStein, RuedigerMass spectrometer VG Micromass 602
7Uvigerina finisterrensis, d18OU. finist d18Oper mil PDBStein, RuedigerMass spectrometer VG Micromass 602
8Uvigerina finisterrensis, d13CU. finisterrensis d13Cper mil PDBStein, RuedigerMass spectrometer VG Micromass 602
9Uvigerina peregrina, d18OU. peregrina d18Oper mil PDBStein, RuedigerMass spectrometer VG Micromass 602
10Uvigerina peregrina, d13CU. peregrina d13Cper mil PDBStein, RuedigerMass spectrometer VG Micromass 602
11Uvigerina spp., d18OUvigerina spp. d18Oper mil PDBStein, RuedigerMass spectrometer VG Micromass 602U. peregrina + U. finisterrensis
12Uvigerina spp., d13CUvigerina spp. d13Cper mil PDBStein, RuedigerMass spectrometer VG Micromass 602U. peregrina + U. finisterrensis
13Uvigerina sp., d18OUvigerina sp. d18Oper mil PDBStein, RuedigerMass spectrometer VG Micromass 602
14Uvigerina sp., d13CUvigerina sp. d13Cper mil PDBStein, RuedigerMass spectrometer VG Micromass 602
Size:
542 data points

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