Jökull - 01.12.1964, Blaðsíða 16

Fig. 10. View from the
old terminal moraine of
Hálsajökull towards the
recent one. The big, dark
block shown on fig. 9 is
visible in front of the
moraine to the right on
the photograph.
Photo: S. Thorarinsson,
July 25, 1964.
which also have a flat intake area, reached their
maximum extension quite recently (Thorarins-
son 1949).
In many peat bogs, especially in Northern
Iceland, the transition from subboreal to sub-
atlantic conditions is very marked, indicating
a sudden and great change in the climate,
which seems to have become both colder and
more humid. For a period of unknown length
the subatlantic climate must have been a little
more favourable for glacier growth, viz. a little
more severe, than the climate of the “Little
Ice Age”. This period was long enough to bring
highly alpine glaciers in Iceland frorn their
minimum to their maximum extension in Post-
glacial Time, but not long enough to bring
outlet glaciers with a flat intake area to a
similar position.
REFERENCES:
Hannesson, P., 1953. Á Brúaröræfum. Hrakn-
ingar og heiðavegir III: 18—64. Reykjavík.
Jennings, J. N., 1952. Snaefell, East Iceland.
The Journ. of Glaciol. 2, No. 12: 133-137.
Thorarinsson, S., 1956. On the Variations of
Svínafellsjökull, Skaftafellsjökull and Kvíár-
jökull in Öræfi. Jökull, 6. ár: 1—15.
Thorarinsson, S., 1963. Eldur í Öskju — Askja
on Fire. Almenna bókafélagið. Reykjavík.
Todtmann, E. M., 1955. Úbersicht úber die
Eisrandlagen in Kringilsárrani von 1890—
1955. Jökull, 5. ár: 8-10.
— 1957. Kringilsárrani, das Vorfeld des Brúar-
jökull, am Nordrand des Vatnajökull. 1955
Neues Jb. Geol. u. Paláontol., Abh. 104, 3:
255-278.
— 1960. Gletscherforschungen auf Island.
(Vatnajökull). Cram, De Gruyter Sc Co.
Hamburg.
Woldstedt, P., 1938. Vergleichende Untersuch-
ungen an islándischen Gletschern. Jb.
Preusz. Geol. L. A. 59: 249—271.
Vatnajökull hlaupinn. Frásögn Þorvarðar læknis
Kjerúlfs 1890. Jökull, 12. ár: 47-48.
ÁGRIP
1 ofanritaðri grein er fjallað um öskulaga-
rannsóknir á Brúarörœfum og kringum Snœfell
i þvi skyni að ákvarða aldur þeirra jökulgarða,
er sýna mesta útbreiðslu Brúarjökuls og Hálsa-
jökuls austan í Snœfelli síðan isa leysti af land-
inu i lok siðasta jökulskeiðs.
Frá Kverkárnesi ausiur i Maríutungur teygja
JÖKULL 1964
74