The mode and nature of ice‐flow mechanism leading to ice‐lobe formation during deglaciation is described. These mechanisms are deduced primarily from their geomorphological and stratigraphical effects: the arc‐like formations fringing the ice lobes, certain patterns of landform elements, and in some cases the stratigraphical signs indicating ice‐marginal readvance or lack of it. Several ice‐lobe creation mechanisms are presented along with the associated landform patterns they produce. The theory encompassing the fan‐like ice flows, the ice‐lobe formation, and the arc formations fringing them is applied to the deglaciation in Soviet Karelia and adjacent Finland. Deglaciation proceeded here from the southeast to the northwest, and complex arc formations derived from the major ice lobes. The Finnish Lake District lobe, the North Karelian lobe, the Kuusamo lobe, and the other lobes in northeastern Finland were in general metachronously formed.

Kurimo, Heikki 1980 09 01: Depositional deglaciation forms as indicators of different glacial and glaciomarginal environments. Boreas, VOI. 9, pp. 179-191. O~I O . ISSN 0300-9483.The current system of nomenclature for landform elements associated with deglaciation is often insufficient and inappropriate to describe the total depositional environment. There is a manifold transition of the deposits in regard to morphology, orientation, arrangement, material, and material-related properties. A multidimensional scheme constructed to be maximally informative of the depositional environment is presented.

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