Stable isotope ratios of benthic foraminifera from DSDP Hole 79-544B (Table 1)

DOI

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.

Supplement to: Stein, Ruediger; Sarnthein, Michael (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

Identifier
DOI https://doi.org/10.1594/PANGAEA.267747
Related Identifier https://doi.org/10.2973/dsdp.proc.79.109.1984
Related Identifier https://doi.org/10.2312/reports-gpi.1984.4
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.267747
Provenance
Creator Stein, Ruediger ORCID logo; Sarnthein, Michael
Publisher PANGAEA
Publication Year 2004
Rights Creative Commons Attribution 3.0 Unported; https://creativecommons.org/licenses/by/3.0/
OpenAccess true
Representation
Language English
Resource Type Supplementary Dataset; Dataset
Format text/tab-separated-values
Size 542 data points
Discipline Earth System Research
Spatial Coverage (-9.405 LON, 33.767 LAT); North Atlantic/PLATEAU