Chronology of Quaternary terrace deposits at the locality Hohle Gasse (Pratteln, NW Switzerland)

TY - JOUR

T1 - Chronology of Quaternary terrace deposits at the locality Hohle Gasse (Pratteln, NW Switzerland)

AU - Claude, Anne

AU - Akcar, Naki

AU - Ivy-Ochs, Susan

AU - Schlunegger, Fritz

AU - Rentzel, Philippe

AU - Pumpin, Christine

AU - Tikhomirov, Dmitry

AU - Kubik, Peter W.

AU - Vockenhuber, Christof

AU - Dehnert, Andreas

AU - Rahn, Meinert

AU - Schluchter, Christian

PY - 2017/10

Y1 - 2017/10

N2 - The Quaternary stratigraphy of the Alpine Foreland consists of distinct terrace levels, which have been assigned to four morphostratigraphic units: Höhere (Higher) Deckenschotter, Tiefere (Lower) Deckenschotter, Hochterrasse (High Terrace) and Niederterrasse (Lower Terrace). Here, we focus on the terrace gravels at Hohle Gasse, SSE of Pratteln near Basel, which are mapped as Tiefere Deckenschotter. Petrographic and morphometric data established from clasts allowed to infer the transport mechanisms and sources of the gravels. Sedimentological analyses indicate that the gravels were transported by a braided river and deposited in a distal glaciofluvial setting. In addition, it can be shown that the majority of the clasts display multiple reworking and only a minority maintained a distinct glaciofluvial shape. Cosmogenic multi-isotope dating using 10Be and 36Cl allowed direct dating of the sediments at the study site. A depth-profile age of 270-190+830 ka for 10Be was achieved for the deposits at Hohle Gasse. Unfortunately, no age could be modelled from the 36Cl concentrations as the blank correction was too high. Furthermore, this age proves that the studied terrace level should be assigned to the morphostratigraphic unit Hochterrasse.

AB - The Quaternary stratigraphy of the Alpine Foreland consists of distinct terrace levels, which have been assigned to four morphostratigraphic units: Höhere (Higher) Deckenschotter, Tiefere (Lower) Deckenschotter, Hochterrasse (High Terrace) and Niederterrasse (Lower Terrace). Here, we focus on the terrace gravels at Hohle Gasse, SSE of Pratteln near Basel, which are mapped as Tiefere Deckenschotter. Petrographic and morphometric data established from clasts allowed to infer the transport mechanisms and sources of the gravels. Sedimentological analyses indicate that the gravels were transported by a braided river and deposited in a distal glaciofluvial setting. In addition, it can be shown that the majority of the clasts display multiple reworking and only a minority maintained a distinct glaciofluvial shape. Cosmogenic multi-isotope dating using 10Be and 36Cl allowed direct dating of the sediments at the study site. A depth-profile age of 270-190+830 ka for 10Be was achieved for the deposits at Hohle Gasse. Unfortunately, no age could be modelled from the 36Cl concentrations as the blank correction was too high. Furthermore, this age proves that the studied terrace level should be assigned to the morphostratigraphic unit Hochterrasse.

KW - AMS FACILITY

KW - Be-10

KW - COSMOGENIC NUCLIDES

KW - Cosmogenic

KW - DATING APPROACH

KW - DRAINAGE NETWORK

KW - Deckenschotter

KW - Depth-profile dating

KW - EROSION RATES

KW - Hochterrasse

KW - ISOTOPE-DILUTION

KW - NORTHERN ALPINE FORELAND

KW - SWISS ALPS

KW - TRANSPORT PATHS

KW - UPPER RHINE GRABEN

UR - http://www.scopus.com/inward/record.url?scp=85023769505&partnerID=8YFLogxK

U2 - 10.1007/s00015-017-0278-z

DO - 10.1007/s00015-017-0278-z

M3 - Journal article

SN - 1661-8726

VL - 110

SP - 793

EP - 809

JO - Swiss Journal of Geosciences (Print Edition)

JF - Swiss Journal of Geosciences (Print Edition)

IS - 3

ER -