Acoustic Doppler Current Profiler (ADCP) data of sites GeoB22716-1, GeoB22717-1 and GeoB22732-1 during RV SONNE cruise SO260/1 and rock descriptions ...

• Main Authors: Bozzano, Graziella, Baqués, Michele, Schwenk, Tilmann, Kasten, Sabine
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2020
• Subjects: ADCP data; Argentine continental slope; SW Atlantic; Center for Marine Environmental Sciences MARUM; Antarctic; Antarctic Peninsula; Argentine; Scotia Sea; The Antarctic; Antarc*; Iceberg*; Tierra del Fuego
• Online Access: https://dx.doi.org/10.1594/pangaea.925557; https://doi.pangaea.de/10.1594/PANGAEA.925557

This data set include (1) the detailed petrographic description of the diagnostic rock types used to infer the source areas of the material recovered from the Mar del Plata Canyon area (Western South Atlantic at 38° S) at Sites GeoB13830, GeoB22712, GeoB22717 and L45; and (2) the Acoustic Doppler Current Profiler (ADCP) data obtained from Sites GeoB22716, GeoB22717 and GeoB22732.A variety of gravel- to cobble-sized rocks, recovered from the Mar del Plata Canyon area and interpreted as ice-rafted debris, represents the first evidence that large icebergs have floated in the Falkland (Malvinas) Current from the southern polar high latitudes far northward. Detailed petrographic analyses identified the Antarctic Peninsula, sub-Antarctic islands in the Scotia Sea, and Tierra del Fuego as plausible source areas. In the Mar del Plata Canyon, a combination of local slope instability and strong and persistent contouritic bottom currents, favored local enrichment in dropstones in the form of a loose, coarse sediment ...