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Auteur (up) Häuselmann, P.; Granger, D.E.; Jeannin, P.Y.; Lauritzen, S.E.
Titre Abrupt glacial valley incision at 0.8 Ma dated from cave deposits in Switzerland Type Journal Article
Année 2007 Publication Geology Revue Abrégée Geology
Volume 35 Numéro Pages 143-146
Mots-Clés
Résumé Glacial erosion dramatically alters mountain landscapes, but the pace at which glaciers carve a previously fluvial landscape remains poorly defined because long-term valley incision rates are difficult to measure. Here we reconstruct the lowering history of the Aare Valley, Switzerland, over the past 4 m.y. by dating cave sediments with cosmogenic Al-26 and Be-10. Incision accelerated from similar to 120 m/m.y. to similar to 1200 m/m.y. at 0.8-1.0 Ma, at least 1 m.y. after the onset of local glaciation. Rapid incision may have been triggered by lowering of the equilibrium line altitude at the mid-Pleistocene climate transition
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Numéro d'Appel refbase @ user @ collection 56
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Auteur (up) Häuselmann, P.; Lauritzen, S.E.; Jeannin, Pierre-Yves; Monbaron, M.
Titre Glacier advances during the last 400 ka as evidenced in St. Beatus Caves (BE, Switzerland) Type Journal Article
Année 2008 Publication Revue Abrégée Quaternary International
Volume 189 Numéro Pages 173-189
Mots-Clés
Résumé While stalagmites within caves are commonly used to obtain information about past climate change, little attention has so far been given to the cave, its morphology, and many other types of deposits contained in it. The discontinuous nature of cave sediments and the possibility that caves are re-shaped by more recent water circulations has discouraged many researchers, despite the fact that it is just this intimate relationship between the cave and surface conditions that makes caves such valuable archives. This article presents a method of determining a relative chronology which can then be dated numerically. Information from St. Beatus Cave and other nearby caves provides evidence of glacial advances that occurred within the following time windows: 4350, 235�180, 160�135, 114�99, 76�54, and 30�16 ka. It also describes the following dated periods of valley deepening: 805�760m a.s.l. (4350 ka), 760�700m a.s.l. (235�180 ka), 700�660m a.s.l. (160�135 ka), and 660�560m a.s.l. (30�16 ka). These dates are new for this part of the Alpine Arc.
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Auteur institutionnel Thèse
Editeur Lieu de Publication Éditeur
Langue Langue du Résumé Titre Original
Éditeur de collection Titre de collection Titre de collection Abrégé
Volume de collection Numéro de collection Edition
ISSN ISBN Médium
Région Expédition Conférence
Notes Approuvé no
Numéro d'Appel refbase @ user @ collection 54
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