Dumpstones as records of overturning ice rafts in a Weichselian proglacial lake (Rügen Island, NE Germany)

• Autorzy: Pisarska-Jamroży M. , Van-Loon A. J. T. , Bronikowska M.

Identyfikatory

DOI

10.7306/gq.1448

• Języki publikacji: EN

Abstrakty

EN

Dumpstones and dropstones up to 0.8 m in size occur in a silty/sandy Weichselian glaciolacustrine succession near Dwasieden on Rügen Island in the SW Baltic Sea (NE Germany). The deposits are exceptional because two levels of dumpstones and dropstones are present, suggesting two dumping phases interrupting characteristic fine-grained glaciolacustrine sedimentation. Plastic downwarping of sediments below the dumpstones and dropstones result in soft-sediment deformation structures. The distribution and orientation of the long axes of the clasts are useful tools for the reconstruction of the state of the lake bottom, as well as for the water depth. The horizontal position of the gravels and boulders (parallel to the bedding) suggests deposition in relatively shallow-water. The dumping events are linked to iceberg rafting in a glacial lake during the Weichselian Glaciation (MIS 2).

Słowa kluczowe

EN

dumpstones; dropstones; ice-rafted debris; Weichselian; glaciolacustrine sediments

• Wydawca: Państwowy Instytut Geologiczny - Państwowy Instytut Badawczy
• Czasopismo: Geological Quarterly
• Rocznik: 2018
• Tom: Vol. 62, No. 4
• Strony: 917--924
• Opis fizyczny: Bibliogr. 60 poz., fot., rys.

Twórcy

autor

Pisarska-Jamroży M.

• Adam Mickiewicz University, GeoIogical Institute, Krygowskiego 12, 61-680 Poznań, Poland

autor

Van-Loon A. J. T.

• Shandong University of Science and Technology, College of Earth Science and Engineering, Qingdao 266590, Shandong, China
• Geocom Consulting, Valle del Portet 17, 03726 Benitachell, Spain

autor

Bronikowska M.

• Adam Mickiewicz University, GeoIogical Institute, Krygowskiego 12, 61-680 Poznań, Poland

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Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).