Jökull - 01.12.1990, Qupperneq 56

Figure 3: Glacial directional features in the area to
the north of Hofsjökull. For legend see Fig. 2.
— Skriðstefna jökuls og jaðarmyndanir norðan
Hofsjökuls. Sjá skýringar á mynd 2.
from the valley between Hekla and Tindfjallajökull
can be found too. The youngest striae show thaí move-
ment from the Þjórsá river basin was dominating but
older striae indicate movement from the Hvítá area as
well.
Hvítá and southern Kjölur area — Glaciers from
the Langjökull area joined the main glacier down-
stream from Bláfell mountain. To the north and east
of Bláfell, there was a continuous ice cover, but later,
Langjökull ice cap was separated from the inland ice.
The youngest striae on Haukadalsheiði (Fig. 5) show
glacial movement to SW crossing that from the Lang-
jökull area. In front of the glacier a sequence of 4
end moraines was formed. At the time of their forma-
tion, glaciers from the Langjökull area did not reach
so far. One of the end moraines has only been found
Figure 4: Glacial directional features in middle
Southem Iceland. For legend, see Fig. 2.
— Skriðstefna jökuls og jaðarmyndanir á Mið
Suðurlandi. Sjá skýringar á mynd 2.
to the north of the river Hvítá. Two of them have been
traced all the way to Geldingafell but farther east no
continuation has been found. These moraines have
been partly mapped before by Sigbjamarson (1967)
and Tómasson (1967).
In the area shown on Fig. 5, the oldest striae di-
rection is towards SW. Younger striae show a gradual
shift from a southwesterly to a northwesterly direc-
tion. The end moraines and fluted moraine show that
this change was concurrent with the deglaciation.
The Kerlingarfjöll mountains divided the ice into
two lobes, both of which moved towards NW. The
easternmost part of the southwestem lobe left striae to-
wards NNE, which can be seen to the NW of Kerlingar-
fjöll. A lake was dammed where the two lobes joined,
leaving lake terraces at 670 m a.s.l. When the ice
front in the Kjölur area had retreated to a position
54 JÖKULL, No. 40, 1990