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

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hummoeky hunmocky moraines that may represent represent the early stage of Salpausselkä salpausselkä I,
partieularly particularly as, direetion-wise, direction-wise, it eould could be an extension of of Salpausselkä 1. I. The plains plains
in the the Baltie Baltic lee Ice Lake about 10 km km northeast northeast ofPatsola eorroborate comoborate the eoneept concept that
the iee ice front initially ran from Patsola to Möhkö Möhko at the time Salpausselkä I formed.
The The Tuupovaara T\rupovaara end end moraine deposited deposited during during the late stage of ofSalpausselkä Salpausselkä 1. I. The
relationship between the end moraine moraine at Tuupovaara Tuupovaara and Koitere suggests that the
part of the Koitere end moraine east of Koitere Koitere represents represents the end of the
Salpausselkä Salpausselk:i I phase and the Salpausselkä II phase.
The landform system most most clearly clearly eontemporaneous contemporaneous with Salpausselkä II is the
Koitere end moraine. Running uninterrupted uninterrupted from from northeast northeast of the village village of
Kiihtelysvaara to the the Russian Russian border (Rainio, 1978, 1985b, 1991 1gg1 [IV]; Frosterus &
Wilkman, wilkman, 1915), 1915), the moraine moraine eontinues continues without without a break into Russian Karelia. It
includes the Selkäkangas Selkäkangas iee-marginal ice-marginal formation, fomation, known sinee since the early days of
work on these formations formations (e.g. Ramsay, 1891).
The boundary boundary between these iee-marginal ice-marginal formations is is marked marked by the eontaet contact of
two two large large glaeiallobes, glacial lobes, The Lake District District and the North Karelia lobes, lobes. where there
is a gap in the the ehain chain of iee-marginal ice-marginal deposits.
The third ehain chain of iee-marginal ice-marginal deposits, the over 100-km-long lOO-km-Iong Pielisjärvi moraine,
is fairly eontinuous, continuous, extending extending from from Jaamankangas Jaamankangas to the Russian border. From its
position, if nothing else, it is younger younger than than Salpausselkä 11. II. Between the north end
of of Salpausselkä Salpausselkä II II at at Kiihtelysvaara and and Jaamankangas there is an interlobate
complex eomplex and and three three eskers. eskers. These These eskers eskers extend to Jaamankangas and are buried by
its delta delta deposits. deposits. Shoreline Shoreline displacement displaeement shows that this chain ehain of end moraines mo raines did
not deposit deposit until after the drainage drainage of the the Baltic Baltie Ice lee Lake, and that it is of about the
same same age as Salpausselkä Salpausselkä III in southwestern southwestern Finland.
The The Pielisjärvi end moraine extends 50 km northeastwards from the large marginal
plain of Jaamankangas Jaamankangas to Uimaharju UimahaIju (Rainio, 1985b). The marginal plains and
valley trains of the formation are at about 105 m a.s.l., clearly elearly below the level of the
Baltic Baltie Ice lee Lake Lake (Saarnisto, 1970; 1970; Rainio, 1985b). The Pielisjärvi Pielisjärvi end moraine was
thus formed after the the drainage of the Baltic Baltie Ice lee Lake Lake and, accordingly, aeeordingly, is younger younger
than Salpausselkä II. 11. The Pielisjärvi end moraine may also be time-correlative time-eorrelative with
Salpausselkä Salpausselkä III (Sauram (Sauramo, o, L929, 1929, Rainio, 1985b).
Northeast Northeast of Uimaharju, UimahaIju, the ice-marginal iee-marginal deposits was deposited mainly on supraaquaticaquatie
terrain except exeept north of Lake Lake Koitere Koitere where it was deposited in a glacial glaeial
lake. This area excluded, the ice-marginal iee-marginal formation extends as an almost unbroken
moraine moraine ridge across aeross the Russian border.