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Saalian to Weichselian stratigraphy and sedimentation along the Lågjæren – Høgjæren escarpment, southwest Norway
Author(s) -
Stalsberg Knut,
Landvik Jon Y.,
Larsen Eiliv,
Sejrup Hans Petter
Publication year - 1999
Publication title -
journal of quaternary science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.142
H-Index - 94
eISSN - 1099-1417
pISSN - 0267-8179
DOI - 10.1002/(sici)1099-1417(199907)14:4<299::aid-jqs444>3.0.co;2-9
Subject(s) - geology , escarpment , deglaciation , moraine , outwash plain , glacial period , marine isotope stage , isotopes of oxygen , quaternary , geomorphology , paleontology , surface exposure dating , interglacial , geochemistry
Quaternary sediments along a profile crossing the southern part of the Jæren escarpment, southwestern Norway, have been investigated with regard to their glacial history and sea‐level variations. Deposits from at least three glaciations and two ice‐free periods between Oxygen Isotope Stage 6 and the Late Weichselian have been identified. Subglacial till directly overlain by a glaciomarine regressional succession indicates a deglaciation, and amino acid ratios in Elphidium excavatum between 0.083 and 0.118 date this event to Oxygen Isotope Stage 6. Sea‐level dropped from 130 to below 110 m a.s.l. Subsequently, a short‐lived ice advance deposited a marginal moraine and a sandur locally on the escarpment. Stratigraphical position and luminescence dates around 148 ka BP suggest deposition during the final stage 6 deglaciation. A Late Weichselian till covers most of the surface of Jæren. In addition to a well documented westerly ice flow, glaciotectonic indications of ice flow towards the north have been found. Ice flow directions and a hiatus between Oxygen Isotope Stage 6 and the Weichselian indicate enhanced erosion along the escarpment and the influence of a Norwegian Channel ice‐stream. Copyright © 1999 John Wiley & Sons, Ltd.