Classification and terminology of morainic landforms in Finland

Auteur :
AARIO H.,

Description :
The terms assigned to Finnish morainic landforms were frequently originally established for areas where the glacial environment was different from that in Finland. The terms therefore are not always applicable to the conditions found here and there is a need for some revision. Some new proposals are presented in this paper. Landforms tend to form groups of closely related genetic assemblages or of complexes where the members are areally related, but often genetically different. It is more logical to handle them as an association of forms, rather than to split the group artificially into a number of separate units. A gradational series of assemblages from a fluting assemblage into a drumlin assemblage and further into a hummocky active-ice assemblage characterizes the Koillismaa reference area. A bimodal flow system prevailed during the formation of the landforms. Spiral flow predominates in the formation of flutings and linear drumlins, whereas up and down movement predominates in the formation of the transverse ridges of Rogen moraine. Between these end members combinations of these flow patterns occur. (E. Jahn).


Type de document :
Article de périodique

Source :
Boreas. An international journal of Quaternary geology, 1977, vol. 6, n°. 1, p. 87-100

Date :
1977