Open AccessA radiocarbon‐dated Ancylus transgression site in south‐eastern Finland
Author(s) -
ERONEN MATTI
Publication year - 1976
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.1502-3885.1976.tb00332.x
Subject(s) - marine transgression , radiocarbon dating , geology , peat , quaternary , chronology , holocene , palynology , paleontology , structural basin , archaeology , pollen , geography , ecology , biology
A previously studied site at Hangassuo in the commune of Anjalankoski, formerly Sippola, in south‐eastern Finland has been re‐examined. The basal layers of the profile contain a clay‐gyttja horzon deposited on peat, indicative of the Ancylus Lake transgression. A date of approx. 9500 B.P. was obtained for the lower peat layer, deposited after isolation of the basin during the Yoldia phase, and a date of 9280 ± 190 B.P. for the lower part of the transgression horizon. The upper part gave a date of 8870 ± 170 B.P. These dates suggest that the beginning of the Ancylus Lake phase and the Ancylus transgression occurred considerably earlier than has previously been suggested in the Late Quaternary chronology for Finland. The appearance of Alnus in the area is also dated. The pollen curve begins at 8360 ± 190 B.P. and the major increase of the species occurs at 7810 ± 180 B.P. The events in the history of the Ancylus Lake and problems connected with these are discussed.