Mots-clés
Datation ; Datation relative ; Holocène ; Marteau de Schmidt ; Moraine ; Norvège ; Norvège du Sud ; Petit âge glaciaire ; QuaternaireDating ; Holocene ; Little ice age ; Moraine ; Norway ; Quaternary ; Relative dating ; Schmidt hammer ; Southern NorwayCuaternario ; Datación ; Datación relativa ; Holoceno ; Morrena ; Noruega ; Pequeña edad glaciarEvaluating the Schmidt hammer as a method for distinguishing the relative age of late Holocene moraines : Svellnosbreen, Jotunheimen, Norway
Glacial and paraglacial environments
Auteur(s) et Affiliation(s)
FFOULKES, C.
ADAS, Pendeford House, Wolverhampton, Royaume-Uni
HARRISON, S.
College of Life and Environmental Sciences, Univ., Exeter, Royaume-Uni
KNIGHT, J.
School of Geography, Archaeology and Environmental Studies, Univ. of Witwatersrand, Johannesburg, Afrique du Sud
HARRISON, S.
College of Life and Environmental Sciences, Univ., Exeter, Royaume-Uni
Description :
The AA. used the Schmidt hammer to assess the relative exposure ages of previously dated Little Ice Age moraines deposited by Svellnosbreen glacier in Jotunheimen southern Norway. Schmidt hammer measurements were taken on moraine surfaces which have been deglaciated for 79–259 years since the Little Ice Age, to reconstruct and date previous snout positions. Dating used a typical linear Little Ice Age age-calibration curve and the ages of unknown surfaces were predicted based on Schmidt hammer measurements with the support of lichenometric dates. Calibrated ages exhibited potential dating errors of 63-103 years years, which were estimated using 95% confidence intervals associated with two control points based on moraines of known ages. Schmidt hammer R-value variability was identified and sources of significant errors were attributed to variations in boulder surface texture and the incorporation of weathered boulders into moraines through push mechanisms and paraglacial reworking.
Type de document :
Article de monographie
Source :
Geografiska annaler. Series A. Physical geography, issn : 0435-3676, 2014, vol. 96, n°. 3, p. 393-402, nombre de pages : 10, Références bibliographiques : 33 ref.
Date :
2014
Editeur :
Pays édition : Suede, Stockholm, Svenska sällskapet för antropologi och geografi
Langue :
Anglais
Anglais
Droits :
Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI)
Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI)