Jökull - 01.12.1975, Page 43

Fig. 2. View southwards from the summit of Sudurmannasandfell, Arnarvatn stóra on right,
Langijörfi on left. Note the lines of escarpments and low hills between them.
Mynd 2. Horft til suðurs af Suðurmannasandfelli. Arnarvatn stóra til hœgri, Langijörfi til
vinstri. Takið eftir beinum brúnum og lágum hæðum milli þeirra.
graphs and a field examination on the grouncl
in the summer of 1970 made it possible to draw
up a picture of these features as shown in Fig. 1.
Some of the hills show a marked ‘step’ profile,
as, for instance, the two Saudafells wlien viewed
from the south-west.
The dominant trend of the lines of escarp-
ments is north-east to south-west, with tlie
steepest slopes facing north-west. In some places,
especially on the feature with summit 574 m,
just south of Reykjavatn, the escarpments be-
come channels incised through the hills.
Some of the escarpments were examined in
detail, especially those on a line from Stóralón
(S 408 on Fig. 1) through Mordísarhæd, over
Arnarvatnsliædir to Arnarvatn stóra. The hill
to the east of Stóralón has two flat-topped
summits at 484 and 489 m, and 30 m below
1 0 1 2 3 4 5 kms.
I__1__I--1---1---1--1
Fig. 3. Cross-section AA and BB as shown by lines on Fig. 1.
Mynd 3. Þversnið AA og BB á Mynd 1.
JÖKULL 25. ÁR 41