(Table S1) Tie-points used in age model construction for ODP Leg 172 sites ...

• Main Authors: Thornalley, David J R, Barker, Stephen, Becker, Julia, Hall, Ian R, Knorr, Gregor
• Format: Dataset
• Language: English
• Published: PANGAEA 2013
• Subjects: Event label; Latitude of event; Longitude of event; Elevation of event; DEPTH, sediment/rock; Age model; Tie point; Composite Core; Leg172; Joides Resolution; Ocean Drilling Program ODP; Northwest Atlantic
• Online Access: https://dx.doi.org/10.1594/pangaea.821830; https://doi.pangaea.de/10.1594/PANGAEA.821830

ix Ocean Drilling Program (ODP) sites, in the Northwest Atlantic have been used to investigate kinematic and chemical changes in the "Western Boundary Undercurrent" (WBUC) during the development of full glacial conditions across the Marine Isotope Stage 5a/4 boundary (~70,000 years ago). Sortable silt mean grain size(sort s) measurements are employed to examine changes in near bottom flow speeds, together with carbon isotopes measured in benthic foraminifera and % planktic foraminiferal fragmentation as proxies for changes in water-mass chemistry. A depth transect of cores, spanning 1.8-4.6 km depth, allows changes in both the strength and depth of the WBUC to be constrained across millennial scale events. Sort s measurements reveal that the flow speed structure of the WBUC during warm intervals ("interstadials") was comparable to modern (Holocene) conditions. However, significant differences are observed during cold intervals, with higher relative flow speeds inferred for the shallow component of the WBUC ... : Supplement to: Thornalley, David J R; Barker, Stephen; Becker, Julia; Hall, Ian R; Knorr, Gregor (2013): Abrupt changes in deep Atlantic circulation during the transition to full glacial conditions. Paleoceanography, 28(2), 253-262 ...