Fróðskaparrit - 01.01.1977, Page 181

Glacial striae, roches moutonnees and ice movements
189
ing the dominating system of fault lines with lamellar zones
several meters in width. The hummocky cross-section is due to
the eastward ice movement, for which the lamellae have acted
as zones of weakness.
Observations of striae and roches moutonnees have been
made along Hovsá. At the western end of the cirque and on its
south side the ice movement has been to the east (sites 51, 52,
53, and 27), while on the steep south-facing valley slope it
appears to have been towards the SE (sites 50 and 54). East-
erly ice movement is recorded by a drumlin at Porkeri (site 26).
Botnur.
The iceshed between the Hov valley and the west-facing
valley of Botnur, with its many small lakes, lies on the moun-
tain ridge between Borgarknappur and Hvannafelli. SW of
Ryskivatn roches moutonnees have been observed on both
sides of the gravel road. These were formed by ice moving
towards the SW (site 67).
Vágur.
Because of the rich soil and grass cover of the slopes, no
definite roches moutonnees have been found eastward from
Vágur along the north side of the fjord until in the vicinity
of Nes (site 24), where the stoss and lee sides of the exposures
indicate that ice movement has been towards the east. The
exposures on the mountain slopes are clearly glaciated but
greatly weathered. On the southern side of the fjord roches
moutonnees, indicating ice movement towards the ESE, have
been found only at site 35.
At Vágseiði the terrain is relatively smooth and has a rich
vegetation cover. Only at the extreme east end of the little
lake whose basin has been cut out of the bedrock are exposures
found, in the shape of well-formed roches moutonnees which
indicate ice movement towards the SW (site 25, fig. 5). The
U-shaped profile of the short valley is very obvious when seen
from the east. To the west the valley is terminated by a sheer
coastal cliff about 30 m. high.