Jökull - 01.12.1985, Page 69

Plate 3. Partial bedding of material
in main ridge near GLJ4. — Snið í
jarðvegi nærri staðnum GLJ4.
will however be instructive to resurvey the area affected
by the burst within the next two to three years to see
how long traces of such transient yet quite effective
processes, in terms of the amount of material moved,
actually last.
CONCLUSION
The studies undertaken in 1983 have continued those
started in 1979, examining both the present and past
status of Gljúfurárjökull. They have confirmed that
while still advancing the rate of forward movement of
the glacier is slowing and it seems possible that in the
next few years the glacier may become virtually station-
ary. It has also been possible to improve our under-
standing of the pattern of variations in the position of
the glacier over the last 100 years and to confirm the
Little Ice Age date of the outermost moraine. Not only
is Gljúfurárjökull extremely valuable for the study of
past glacier variations but it is also still extremely active
geomorphologically as witnessed by the formation of
features associated with the burst, features which may
perhaps often occur in such environments but which are
rarely examined in detail due to their rapid removal by
other processes of the glacier margin environment.
ACKN O WLED GEMENTS
The work undertaken in 1983 was carried out by
members of the Exeter University North Iceland Expe-
dition — Kate Ahern, Adrian Green, Jane Hide, Bridget
Mayes, Heather Pardoe and Philip Wookey. The Expe-
dition was supported by generous grants from the Royal
Geographical Society, William Cadbury Trust and the
University of Exeter Myrtle Murray Award. We are
extremely grateful to the help received locally from Hjört-
ur Thorarinsson at Tjörn and also from Thóroddur
Thóroddsson and Helgi Hallgrímsson at the Natural
History Museum, Akureyri. The figures were all drawn
by Terry Bacon and photographed by Andrew Teed in
the Department of Geography at Exeter.
ÁGRIP
LANDMÆLINGAR VIÐ GLJÚFURÁR-
JÖKUL OG ATHUGANIR TENGDAR
JÖKULHLAUPI
C.J. Caseldine,
Exeterháskóla
Landmælingar sýna að sporður Gljúfurárjökuls gekk
fram um 25 m frá 1981 til 1983. Höfundur telur að
jökulhlaup hafi fallið frá jöklinum um veturinn 1982-
83.
Plate 4. Lower section of deposit below site C showing
main ridge and spread of finer material. - Neðri hluti
hlaupsets neðan við staðinn C.
JÖKULL 35. ÁR 67