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

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Hyyppä Hyyppä (1936, p. p.437, 437, app. 7) was the first to suggest that the Baltie Baltic lee Ice Lake (B 11) II)
had extended through eastern Finland Finland to Kuusamo. Kuusamo. Thus, at the time the
Salpausselkäs were were formed the iee ice front would have trended northwards from North
Karelia.
His ideas ideas were baeked backed up by the eonclusions conclusions reaehed reached by Sauramo Saura-o (1937, (1gBZ, pp. 17 L7 - 22)
and Kilpi (1937, pp. 111 - 113) from shoreline displaeements displacements studies eondueted conducted in
North Karelia and Kainuu. Sauramo (1937, p. 9) summarized the old and new
eoneepts concepts by stating that: " .. ...in .in eontrast contrast to what what has been eonsidered considered thus far,
Salpausselkä Salpausselkä I does not trend to NE NE towards towards East East Karelia Karelia and Lake Se Segozero go zero
(Seesjärvi) but direetly directly northwards northwards towards Lake Pielinen". Further, "at "at the time of
the Baltie Baltic lee Ice Lake, the iee ice had disappeared from the east of ofthe the Pielinen basin and
during the Yoldia stage from almost almost the the whole basin. basin. Henee, Hence, it was possible that
already during the Salpausselkä stage the Baltie Baltic Sea sea extended from the south
between the eastern water water divide divide and and the iee ice sheet sheet as far far as Maanselkä" and further
still, as pointed out by Kilpi Kilpi (op. eit. cit. p. 17 - 18). 18).
On the basis of of the the interpretation of of shoreline displaeement, displacement, Sauramo Saurams (1937, (1987, p. 9,
1958, pp. 100, 396) 396) maintained "that the the front front of the eontinental continental iee ice in North
Karelia had already already lain lain at at the the morphologieal morphological Seeond Second Salpausselkä at the time of
the First First Salpausselkä. The great great end moraines of southern Finland are united in
North Karelia ". The eontinuous continuous Salpausselkä would would aeeordingly accordingly start in the area of
Kitee-Kesälahti (Sauramo, 1937, 1937, p. 9) 9) or or in in the area of Tohmajärvi-Onkamo
Tohmajärvi-Onka-o
(Sauramo, 1958, 1958, p. 100). 100).
In the following decades deeades Sauramo and Hyyppä and their students refrned refined their coneoncepts.eepts. Brenner was was probably the only one who did not respect the the frndings findings of Hyyppä and
Sauremo. Sauramo. In his study in which whieh he analysed the the lobate behaviour of the continental eontinental
ice iee sheet, Brenner claimed elaimed that the ice-marginal iee-marginal deposits deposits in Russian Karelia
described deseribed by Rosberg most probably represented these these lobes and and were slightly
younger than than Salpausselkäs I and II. 11. According Aeeording to him, him, the the ice iee front front frrst first ran from
Jaamankangas Jaamankangas via Selkäkangas to north ofLake Segozero (Seesjärvi), but later from
Jaamankangas Jaamankangas via Uimaharju UimahaIju to Lake Lake Yushkozero (Jyskyjärvi) and Tuoppajärvi
Lake Topozero (Tuoppajärvi) (Brenner, 1944, pp. 23-25 and Fig. 4, p. 17).
Lake Topozero (Tuoppajärvi) (Brenner, L944, pp. 23-25 and Fig. 4, p. 1-7).
Leiviskä continued eontinued to contend eontend that that at least the the northernmost northernmost fork of Yhdysharju
YhdyshaIju
esker (Connection esker) was part of Salpausselkä II. 11. Jaamankangas was formed
later than the the forks ofYhdysharju ofYhdyshaIju (Connection (Conneetion esker) buried in it (Leiviskä 1951,
pp. pp. 67, 69), but Salpausselkä Salpausselkä II 11 and Jaamankangas had had formed during during the same
marine stage. The difference differenee in elevation was attributed attributed to uplift uplift and disparity of
age (op. cit., eit., pp. pp. 69-70).