Late Quaternary glaciation of the Upper Soča River Region (Southern Julian Alps, NW Slovenia)

摘要: Abstract Extent of Late Quaternary glaciers in the Upper Soca River Region (Southern Julian Alps, SE Europe) has been analyzed using a combination geological mapping, glaciological modeling, and sediment dating (radiocarbon, U/Th series Infrared Stimulated Luminescence-IRSL). Field investigations focused mainly on relatively well preserved sequences Bovec Basin, an intramontane basin located SW Mediterranean/Black Sea divide surrounded by mountain peaks reaching from approximately 2100 up to 2587 m a.s.l. Within Basin we recognized two sedimentary assemblages, which consist same facies association diamictons, laminated lacustrine deposits sorted fluvial sediments. Radiocarbon upper part lake sediments sequence (between 12790±85 5885±60 14 C years b.p.) indicates that younger assemblage was deposited during last glacial maximum through early Holocene (Marine Isotope Stage 21, MIS 2-1). Sediment ages obtained for older with IRSL techniques 154.74±22.88 129.93±7.90 ka b.p. selected samples) have large errors but both methods yield results consistent deposition penultimate glacial–interglacial transition (MIS 6–5). Based analyses field data combined argue complexes formed due high productivity spurred paraglacial conditions present uplands around not extending down floor. Our study shows extent intensity direct sedimentation region previously significantly overestimated.