000135200 001__ 135200
000135200 005__ 20240516095249.0
000135200 0247_ $$2doi$$a10.1016/j.quascirev.2024.108550
000135200 0248_ $$2sideral$$a138525
000135200 037__ $$aART-2024-138525
000135200 041__ $$aeng
000135200 100__ $$aThew, Nigel
000135200 245__ $$aThe Hasli formation of the Irchel plateau – a key record for older early Pleistocene interglacial sediments in northern Switzerland
000135200 260__ $$c2024
000135200 5060_ $$aAccess copy available to the general public$$fUnrestricted
000135200 5203_ $$aIn the Alpine region of Central Europe, terrestrial Early Pleistocene deposits with preserved faunal and botanical remains are rare. The predominantly gravelly Höhere Deckenschotter (HDS) deposits of northern Switzerland and adjoining south-western Germany are considered the oldest Quaternary sediments in the northern Alpine Foreland, linked with the first extensive Quaternary Alpine glaciations.
This multidisciplinary study investigates the Hasli Formation (HF), a unique silty unit with well-preserved biological remains within an HDS sequence at the Irchel Plateau north of Zürich, providing new climatic and environmental data for these exceptional deposits, as well as crucial information about their age. Systematic mapping of the HF, in addition to the underlying and covering gravel units, has been coupled with sedimentary logging and biostratigraphic analysis at several sites. The HF is present over an area c.4 by up to 1.4 km, and where studied is 1.6–6.2 m thick. The sediments and biological material are indicative of overbank deposits accumulating within the damp floodplain of a large meandering river.
The recovered small mammal remains are from eight arvicolid species or genera, including Mimomys pliocaenicus, M. reidi/tigliensis and Clethrionomys cf. kretzoii, which became extinct c.1.8 Ma, and Pliomys episcopalis/simplicior, which first appeared c.2 Ma ago. The over 75k identified molluscs, include c.72k coming from 89 terrestrial species and over 3k from 28 aquatic taxa. The molluscan faunas from all locations where the HF has been studied share important biostratigraphic marker species, and indicate analogous climatic and environmental conditions. The marker species include several that became extinct during the Early Pleistocene, of which Clausilia stranzendorfensis and Cochlostoma salomoni, present throughout the HF, are the most important as they disappeared c.1.8 Ma. Many marker species have modern or palaeo-distributions that lie far to the west, south and east of the Swiss Plateau, showing that the climate was much warmer than today, typical for the Tiglian warm stage. The alluvial floodplain was covered by rather dense, mature woodland.
Amino acid (AA) analysis shows that molluscan remains from the HF are among the oldest of the Quaternary shell material studied from across the Swiss Plateau. Palaeomagnetic data shows a change from reversed to normal polarity within the upper part of the HF. When combined, the small mammal and molluscan remains, palaeomagnetic measurements, AA geochronology and sedimentary data, suggest an age of 2.1–1.8 Ma for the HF. Recently produced cosmogenic dates bracket the age of the HDS gravels beneath the HF to depositional periods between 2.6 and 0.9 Ma, with the youngest ages being in disagreement with our findings. The abundance and diversity of the molluscs from the Irchel Plateau, with several rare extinct species, together with a notable small mammal assemblage, make this a key palaeontological site and an important reference point for European Quaternary biostratigraphy.
000135200 536__ $$9info:eu-repo/grantAgreement/EC/H2020/865222/EU/Bridging Europe: A Quaternary Timescale For The Expansion And Evolution Of Humans/EQUATE$$9This project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No H2020 865222-EQUATE
000135200 540__ $$9info:eu-repo/semantics/openAccess$$aby$$uhttp://creativecommons.org/licenses/by/3.0/es/
000135200 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000135200 700__ $$aKälin, Daniel
000135200 700__ $$0(orcid)0000-0001-5125-9651$$aCuenca-Bescós, Gloria$$uUniversidad de Zaragoza
000135200 700__ $$aBuechi, Marius W.
000135200 700__ $$aPenkman, Kirsty
000135200 700__ $$aScheidt, Stephanie
000135200 700__ $$aKnipping, Maria
000135200 700__ $$aMaier, Fabian
000135200 700__ $$aPérez Urresti, Isabel
000135200 700__ $$aDeplazes, Gaudenz
000135200 7102_ $$12000$$2655$$aUniversidad de Zaragoza$$bDpto. Ciencias de la Tierra$$cÁrea Paleontología
000135200 773__ $$g332 (2024), 108550 [26 pp.]$$pQuat. sci. rev.$$tQUATERNARY SCIENCE REVIEWS$$x0277-3791
000135200 8564_ $$s1614839$$uhttps://zaguan.unizar.es/record/135200/files/texto_completo.pdf$$yVersión publicada
000135200 8564_ $$s2347432$$uhttps://zaguan.unizar.es/record/135200/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000135200 909CO $$ooai:zaguan.unizar.es:135200$$particulos$$pdriver
000135200 951__ $$a2024-05-16-08:54:12
000135200 980__ $$aARTICLE