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FENNIA
N:o 2
can be established with a certainty at least of some centuries, but in
most cases of some decades or even of a single year (Sauramo 1934,
1937).
There are a great number of glacifluvial deltas in Southern
Finland. Most of them occur in several series corresponding to different
ages and different raised levels. One of these well developed series
stands in connection with the recessional moraine of the Second
Salpausselkä, running throughout the whole of Southern Finland. It
Fig. 4. Diagram of the late-glacial shore-lines in Western and Central Finland
showing the direction, rate, and chronology of the intermittent changes of
level at the retreating ice-margin. The figures in the upper margin give the age
of the shore lines and also their relation in regard to the land ice. Marine stadia
shown by thicker lines. The lettering is explained in the text. (Sauramo 1937).
has been built up at the level of the fifth stage of the ice-dammed
Baltic Ice-lake (BV, = Bill Sauramo 1934), which cuts also a
well-marked wave-cut bench south of the delta series, for instance in the
First Salpausselkä moraine. Here the water plane in question lies at
a level from 10 to 8 metres lower than the higher series of deltas
corresponding chronologically with this end-moraine and belonging
to the third stage of the Baltic Ice-lake (Bill, = BII, Sauramo 1934).
The lower and younger delta series of the same end-moraine, again,
lies about 15 m. below the first-named level of the fifth Ice-lake, and
shows the height of the sea during the gotiglacial time (G, = Z,
Sauramo 1934).
Before the Salpausselkä stages the Baltic Ice-lake stood at the
oldest level BI. After the Salpausselkä stages, on the other hand, the
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