Greinar (Vísindafélag Íslendinga) - 01.01.1935, Síða 74

72
at this height or a little higher. This period was followed
by a further subsidence of the land, which was sub-
merged up to 60—70 metres above the present sea-level.
But the uppermost strata in the southern portion of the
Akureyri terrace are of morainal clay, and for this reas-
on I concluded that a glacier had, about that time, flowed
out by the Eyjafjörður valley and been stationary just
south of Akureyri.0 On the east side of the fjord,
opposite to the glacial deposits on the west side, the glac-
ier has also left behind a moraine when retreating, and
the height of the top of this moraine in Vaðlaheiði shows
how high the glacier reached there above the present
sea-level.
Almost contemporaneously with my observations at
Akureyri Guðm. G. Bárðarson carried out investigations
on the shell-strata and shore-lines at Saurbær in Dala-
sýsla (West Iceland), and came to the conclusion that
in a late glacial period the sea did not reach higher than
now, but this was followed by a subsidence of the land
as far as 40—45 metres, and that at the same time the
glaciers advanced to the sea, the edge of the glacier
being stationary there for a long time, or perhaps even
advancing further down. Then the glacier retreated a
little, while the land was submerged to about 80 metres,
and at that time arctic conditions prevailed in the sea
off the coast.1 2)
According to G. G. Bárðarson’s later investigations in
Borgarfjörður which lies to the south of Dalasýsla, some-
thing of the same kind has taken place there also.3) The
sea has once reached about 80 metres above its present
level, and at the same time the glacier covered all the
tributary valleys.
1) Th. Thorkelsson: ”Um ísaldarmenjar og forn sjávarmál
kringum Akureyri", Andvari, Rvik. 1922, p. 44.
2) G. G. Bárðarson: Fossile Skalaflejring'er ved Breiðifjörður
i Vest-Island, Geol. För. i Stockholm Förh., 1921, p. 323.
3) G. G. Bárðarson: Fornar sjávarminjar við Borgarfjörð og
Hvalfjörð. Rit Vís. ísl. I, Akureyri 1923.