Náttúrufræðingurinn - 1993, Side 108

Weichselian deglaciation in South and
South West Iceland. I Environmental
change in Iceland: Past and presenl.
(ritstj. J.K. Maizels & C. Caseldine).
Kluwer Academic Publ. Holland. Bls.
_ 67-77.
Arni Hjartarson & Olafur Ingólfsson 1988.
Preboreal Glaciation of Southern Ice-
land. Jökull 38. 1-16.
Arný E. Sveinbjörnsdóttir, Jón Eiríksson,
Aslaug Geirsdóttir, J. Heinemeier & N.
Rud 1993. The Fossvogur marine sedi-
ment in SW-Iceland - confined to the
Alleröd/Younger Dryas transition by
AMS l4C dating. Boreas 22. 147-158.
Dansgaard, W., J.W.C. White & Sigfús
Johnsen 1989. The abrupt termination of
the Younger Dryas climate event. Na-
ture 339. 532-533
Hákansson, S. 1983. A reservoir age for
the coastal waters of Iceland. Geologiska
Föreningens i Stockholm Förhandlingar
105. 64-67.
Helgi Pjeturss 1904. Athugasemd um jarð-
lög í Fossvogi og víðar í nágrenni
Reykjavíkur. Tímarit Hins ísl. bók-
menntafélags 25. 49-57.
Jóhannes Askelsson 1933. Nokkur orð um
skeljalögin í Fossvogi. Náttúrufrœð-
ingurinn 3. 82-87.
Jón Eiríksson, Leifur A. Símonarson, As-
laug Geirsdóttir, Hafliði Hafliðason, J.-
E. Haugen & H.P. Sejrup 1989. Amino-
acid analyses of Holocene and Upper
Pleistocene molluscs from Iceland. Ab-
stracts and Programme. Nordic sympo-
sium, Skálholt, Iceland 24/6-1/7 1989
(ritstj. Jón Eiríksson & Aslaug Geirs-
dóttir). Bls. 65-66.
Jón Eiríksson, Leifur A. Símonarson, As-
laug Geirsdóttir, Hafliði Hafliðason &
J.-E. Haugen 1990. Application of
amino-acid analyses of fossil molluscs
to stratigarphical problems in Fossvogur
Iceland. Geonytt 17. 41.
Ólafur Ingólfsson 1988. Glacial history of
the lower Borgarfjörður area, western
Iceland. Geologiska Föreningens i
Stockholm Förhandlingar 110. 293-309.
Snorri P. Snorrason 1990. ísaldarlok á
Hellisheiði. I „Vitnisburður um loftslag
í íslenskum jarðlögum". Ráðstefna á
Hótel Loftleiðum 9. apríl 1991. Jarð-
frœðafélag Islands. Bls. 10.
Þorleifur Einarsson 1968. Jarðfræði, saga
bergs og lands. Heimskringla, Reykjavík.
335 bls.
Þorleifur Einarsson 1991. Myndun og
mótun lands. Jarðfræði. Mál og menn-
ing, Reykjavík. 299 bls.
SUMMARY
The Deglaciation of Reykjavík
by
Arni Hjartarson
National Energy Authority
Grensásvegur 9
1S-108 REYKJAVÍK
lceland
The shell-bearing Fossvogur sedi-
mentary layers in Reykjavík have long
been one of the best known fossili-
ferous strata of Iceland. For a long
time, they were regarded as the Ice-
landic type locality for the Eemian
interglacial stage and niore than
100.000 years old. Several years ago,
radiocarbon dates showed these layers
to be from Alleröd and Younger Dryas.
These dates changed not only the
understanding of the formation and
geological history ol' the Fossvogur
layers, but also the whole view on the
late Weichselian geology of SW-
Iceland and the deglaciation of Reykja-
vík. New datings of shell samples frorn
several locations in the neighbourhood
of Reykjavík have now been made and
the results improve the new vision.
Most of the datings were made in
cooperation with scientists al the
Tandem accelerator in the University
of Aarhus.
The radiocarbon ages in the Reykja-
vík area show a glacial coverage of the
whole district at Younger Dryas
maximum. The ice margin must have
218