1 Geosciences and Natural Resource Management, Department of Geosciences and Natural Resource Management, Faculty of Science, Københavns Universitet2 unknown3 Geography, Department of Geosciences and Natural Resource Management, Faculty of Science, Københavns Universitet4 Geography, Department of Geosciences and Natural Resource Management, Faculty of Science, Københavns Universitet
A geological section, 70 m long and 3–4 m high, cut into dead-ice moraine in front of Kötlujökull, has been described. Five-sediment associations were recognized representing (1) proglacial glacio-fluvial sedimentation, (2) deposition and deformation in ice-marginal environment, (3) subglacial deformation and deposition from dynamically active ice, (4) subglacial deposition from stagnant ice and (5) supraglacial re-deposition in dead-ice environment during de-icing. This complete sedimentary sequence represents a single glacier advance-stagnation cycle. The melt-out till displays moderate consolidation, moderate content of fines and angular clasts, and a very strong clast fabric. The lodgement/deformation till displays strong to very strong consolidation, relatively high content of fines, low content of angular clasts, and a weak to strong clast fabric. The occurrence of water-escape structures below the basal till and complete lack of brittle deformations in the lodgement/deformation till suggest water-saturated subglacial conditions during the advance of Kötlujökull.
Developments in Quaternary Science, 2010, p. 145-158