Identification of Quaternary alluvial-fan deposits (Rügen, SW Baltic Sea): Significance for recognition of syn-kinematic sedimentation in glacitectonic complexes

Age assessment of the Jasmund Glacitectonic Complex (SW Baltic Sea) by quartz luminescence dating of syn-kinematic deposits

“…Forming the top section of the outcrop, the M3 till displays a MIS 2 re-advance of the late Weichselian (post-LGM, Pomeranian/Mecklenburgian phase, Niedermeyer et al 2010;Kenzler et al 2010Kenzler et al , 2017. At the base of the M3 complex, the main glacitectonic angular unconformity (GAU, Kenzler et al 2023) is located, separating the whole sequence in pre-(plus locally syn-) and post-kinematic glacitectonic strata (Fig. 2).…”

“…The latter represent a succession of three diamictons interpreted as till units (M0, M1 and M2;Jaekel 1917;Panzig 1995) representing Elsterian (~400-320 ka; Litt et al 2007) or late Saalian (~191-126 ka; Cohen, Gibbard 2011) and Weichselian ice advances of the FIS. The stratigraphic classification of the particular till layers was determined by finegravel analysis and correlation with the regional Quaternary stratigraphy in the SW Baltic Sea area (Panzig 1995) as well as luminescence dating (Krebetschek 1995;Panzig 1995;Kenzler et al 2015Kenzler et al , 2017Kenzler et al , 2022Kenzler et al , 2023 and a few radiocarbon ages (Steinich 1992). These tills are partially interbedded by units of (gla-Fig.…”

“…Black rectangle shows the study area, the Jasmund peninsula, as a part of the island of Rügen. B -Digital Elevation Model (DEM5, 10 times exaggerated, hill shade; processed by J. Hartleib) of the Jasmund peninsula showing the Jasmund Glacitectonic Complex (JGC) divided into the northern and the southern sub-complex, the study site Dwasieden and other important cliff sections mentioned in the text (Kenzler et al 2022(Kenzler et al , 2023 ci-)fluvial and (glaci-)lacustrine sediments (I1 and I2) representing (inter-)stadial units deposited under icefree conditions . A fourth till unit M3 (Jaekel 1917;Panzig 1995) is disconformably overlying the older deposits.…”

“…The following lithostratigraphical unit I1 consists of mostly silty and sandy (inter-)stadial sediments with layers of fine-grained gravel at the base (Fig. 2; Panzig 1995;Kenzler et al 2022Kenzler et al , 2023.…”

“…Gehrmann et al (2022) deciphered the principal structural evolution with the formation of the northern before the southern sub-complex based on morphological and structural features. The stratigraphic interpretation of the JGC formation is mainly based on lithostratigraphic constraints and isolated dating results (Panzig 1995;Niedermeyer et al 2010;Kenzler et al 2015Kenzler et al , 2017Kenzler et al , 2022Kenzler et al , 2023. Gaining numerical age data bears some difficulties due to the lack of directly dateable material.…”