Open AccessIceberg scours, iceberg gravity craters and current erosion marks from a gigantic Preboreal flood in southeastern Norway
Author(s) -
LONGVA ODDVAR,
THORESEN MORTEN K.
Publication year - 1991
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.1502-3885.1991.tb00458.x
Subject(s) - iceberg , geology , impact crater , flood myth , preboreal , erosion , current (fluid) , oceanography , flood basalt , glacial period , geomorphology , paleontology , archaeology , ice sheet , geography , physics , younger dryas , astronomy , volcanism , tectonics
At approximately 9200 BP the Romerike area of southeastern Norway was flooded as much as c. 35 m by a jøkulhlaup from the ice‐dammed lake ‘Nedre Gl'amsjø’. The flood formed characteristic erosion patterns in the surface of soft sediments and eroded channels in overflow passes. Icebergs driven by the floodwater scoured the bottom and formed imprints on the flooded surface when they were stranded as the waterlevel fell. Information from the eroison features is used to reconstruct the palaeocurrents.