Open AccessMaterial provenance in the Ancylus ridge and the ice recession from Öland
Author(s) -
KÖNIGSSON LARSKÖNIG
Publication year - 1979
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.1502-3885.1979.tb00797.x
Subject(s) - geology , ridge , provenance , moraine , archaeology , paleontology , geomorphology , glacial period , geography
The petrographical properties of the classical Ancylus ridge on Öland have been studied. The erratic material proved to be markedly more frequent to the south than to the north of Norra Möckleby parish church. It is suggested that the difference is due to the penetration of glaciofluvial source material into the ridge southward from Norra Möckleby. North of the church the source material may consist of tills. A ridge extends from Jordtorp to Bettorpsören, east of Norra Möckleby. It was found to carry glaciofluvial material in primary position; consequently it is not a terminal moraine as was formerly assumed. This prompts the suggestion that the equicesses of the ice recession run roughly SW‐NE, and not WNW‐ESE, as thought by some writers. An ice lobe striking south between the islands of Öland and Gotland, as has been proposed, thus seems less probable.