Open AccessA Pleistocene sandur in western Norway: facies relationships and sedimentological characteristics
Author(s) -
LANDVIK JON Y.,
MANGERUD JAN
Publication year - 1985
Publication title -
boreas
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.95
H-Index - 74
eISSN - 1502-3885
pISSN - 0300-9483
DOI - 10.1111/j.1502-3885.1985.tb00911.x
Subject(s) - geology , outwash plain , facies , silt , pleistocene , radiocarbon dating , paleontology , geomorphology , fault scarp , glacial period , tectonics , structural basin
At Godøya near Ålesund sequences of unconsolidated fine sand and silt below two till beds are interpreted as remains of a sandur. Two facies sequences dominate: One comprises erosional scours followed by horizontally and current‐ripple laminated fine sand, massive silt and erosional scours. The other sequence differs by planar wedge‐shaped cross‐beds replacing the horizontal lamination. The planar cross‐beds are assumed to represent migrating linguoid or transverse bars, with an orientation partly at a high angle to current ripples in the same beds. The frequent silt beds are interpreted as a result of rapid vertical accretion due to isostatic subsidence during deposition. A Middle Weichselian age is assumed from thermoluminescence, radiocarbon and amino acid dates.