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

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According According to the proponents proponents of the second main interpretation, Salpausselkä Salpausselka II is
contemporaneous contemporaneous with the Pielisjärvi Pielisjärvi chain, chain, and the glaciofluvial deposits and
moraines moraines between Kiihtelysvaara and Paihola, Paihola, the deposits of the Tervasuo complex
and Yhdysharju (Connection esker) esker) all belong to it. A similar idea had been
proposed by Rosberg in 1899. Backed Backed up by more arguments it was also presented
by Repo Repo (1957, (L957, and 1960; Repo & Tynni, T)rnni, 1967, 1967, p. 136), whose opinions were shared
(to start starü with) by Punkari (1979 on the basis of his his ambiguous map) and Hirvas
(1980, Fig. 1), Ignatius et al. (1980, Fig. 11), 11), Nenonen (1984, (1984, 1995b, Fig. Fig.26, 26, p. 58)
and Kujansuu & Nenonen (1987).
Position of the Pielisjärvi end moraine moraine chain
According According to Rainio Rainio (1978, 1985b), the Pielisjärvi Pielisjtirvi ice-marginal formation is a chain
of contemporaneous contemporaneous deposits that that begins at YlämyHy-Honkavaara Ylämylly-Honkavaara at the western westem
end of Jaamankangas, where where a glaciofluvial complex changes into a distinct
ice-marginal formation, and conti continues nu es via via Uimaharju to the Russian border.
Divers opinions opinions have been expressed expressed on the the relation relation of the Pielisjärvi ice-marginal
formation, or or more often its its southwestern southwestern end, end, Jaamankangas, Jaemankangas, to Salpausselkä salpausselkä 11. II.
The key issue has been been how to to interpret interpret the Tervasuo complex (Rainio, 1990, pp.
35-38), Yhdysharju (Connection esker) esker) between Heinävaara Heinävaara and Jaamankangas
(Frosterus & Wilkman, 1915, p. 55) 55) and and the the associated deposits, as well weH as the
movements of the continental continental ice sheet.
In Saurnmo's Sauramo's clay elay chronology (1928, p. 16, Table VIII), the front of the continental
ice sheet sheet was at the Jaamankangas- Jaamankangas- Uimaharju line line in years 100-200 (Fig. (Fig. 6, p. 26
and and Table VII). South South of Jaamankangas, Jaamankangas, the the ice front lay west of ofPyhäselkä Pyhäselkä in year
100 100 and west of Orivesi Orivesi in year 200.
Sauramo Sauramo (1928, p. p. 16), among others, considered Jaamankangas contemporaneous
with Salpausselkä Salpausselkä III, in southwestern southwestern Finland. According to him (19b8, (1958, p. 894), 394), the
Jaamankangas end moraine is part of Salpausselkä Salpausselkä III 111 (".. (" .. die Endmoräine Endmoräne
Jaamankangas Jaamankangas zu dem 3. Salpausselkä Salpausselkä gehört"). gehört"). He also suggested (on (on the basis of
a superficial superficial striation interpretation) that Janmankangas Jaamankangas had formed at the front of
a readvanced ice sheet ("Dabei war sicherlich ein Vorrücken des Eisrandes
eingetreten.") eingetreten.") (op. cit. p. 397).
According According to Saarnisto Saarnisto ( (1970, 1970, pp. pp. 24, 77), the elevation of the Jaamankangas J aamankangas plains
is close elose to that ofthe of the Yoldia Yoldia Sea and so they they are younger than than Salpausselkä II. 11.