DEGLACIATION IN EASTERN AND CENTRAL ... - arkisto.gsf.fi

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The orientation of the Tuupovaara T\rupovaara end moraine moraine suggests that, at the end of the
Salpausselkä Salpausselkä I phase, the ice margin margin east of Lake Koitere Koitere was located at the same snme
level as during the Salpausselkä 11 U phase. phase. Thus, the eastern part of the Koitere icemarginal
formation and its extension extension in Russia Russia may may represent represent both the late
Salpausselkä Salpausselkä I phase phase and the Salpausselkä 11 II phase. phase.
The Tuupovaara T\rupovaara end moraine moraine excludes the possibility suggested by Hirvas (1980),
Ignatius et al. (1980) and Nenonen Nenonen (as late as 1984) (see Kujansuu Kujansuu & Nenonen,
1987) 1987) that during the Salpausselkä Salpausselkä I phase the front front of ofthe the ice sheet extended from
Värtsilä to the Koitere end moraine moraine immediately immediately northeast northeast of Kiihtelysvaara
(Rainio, 1983, 1983, p. 75).
The relationship between Salpausselkä Salpausselkä 11 II and and
the Pielisjärvi end mo moraine raine
According to Sauramo Sauramo (1958, p. 397), 397), Jaamankangas was alandform a landform complex
deposited at the front of ofa a readvanced ice ice sheet ("Dabei war sicherlich ein Vorrücken
des Eisrandes eingetreten"). Analysis Analysis of of glacial lobe lobe dynamics led Salminen &
Hartikainen (1985, pp. 11-12), later supported supported by by Eronen Eronen & Vesajoki (1988, p.824), p. 324),
to much the same conclusion, namely, namely, that that after after the the Salpausselkä salpausselkä II phase the
Lake-District glaciallobe glacial lobe was was initially in the the southern part of the Höytiäinen basin
and that after it had withdrawn the North Karelia lobe readvanced to take its place.
and that after it had withdrawn the North Karelia lobe readvanced to take its place.
Together with their bordering kettle holes, the components of Yhdysharju
(Connection esker) that join Jaamankangas Jaamankangas and are buried buried in its ice-marginal
deposits imply that that the ice sheet withdrew from Salpausselkä II to the level of
Jaamankangas Jaamankangas and that the end moraine deposited at at the front front of it without the
oscillation oscillation of ice extending extending to the distal side of Jaamankmgas Jaamankangas (Rainio, 197s, 1973, pp.
11-13, 11-13, 70-71; 1990, 1990, p. 33; 1991 [IVl, [IV], p. 43).
According to to Eronen and vesajoki Vesajoki (1988, p. 320), "the "the slope of the Jaamankangas
delta surface in a distal distal direction direction from about 1,20 120 m to 105 m a.s.l., along with the
relatively relatively rough rough topography, indicates that a lowering lowering in water water level took place
during deposition deposition of the the glaciofluvial sediments." This This is possible but, then again,
the part of Jaamankangas Jaamankangas above the 105-m level may be a sandur as are the
uppermost uppermost parts of many other other marginal marginal plains (Repo 1957, pp. 14g, 149, 166; 1g60, 1960, pp.
10-11). The The upper part of Janmankangas Jaamankangas has abundant meltwater channels, which
become become shallower shallower and less less frequent frequent in a distal direction direction (Rainio 1928, 1973, pp. 14-16;
Lyytikäinen 1982, 1982, p. p. 39).