Náttúrufræðingurinn - 1978, Page 91

skelja í jarðlögum á íslandi. Skýrsla
um Hið islenska náttúrufræðifélag,
107-1909, 37-40.
— 1910: Island. Handb. d. regionale
Geol. IV, I, 21 bls. Abteilung, Heidel-
berg.
Sigurðsson, Haraldur, 1965: Geology of
tlie Setberg Area Snæfellsnes, West-
ern Iceland. Greinar Vísindafél. Isl.
IV (2), 54-122.
Símonarson, Leifur og Sigriður Friðriks-
dóttir, 1976: Nokkur orð um Nákuð-
ungslögin. Raunvísir, Fréttabréf
Raunvísindastofnunar Háskólans 3,
6-8.
Stemundsson, Kristján, 1977: Jarðfræði-
kort af íslandi, blað 7, Náttúrufræði-
stofnun Islands og Landmælingar Is-
lands.
Thoroddsen, Þorvaldur, 1891: Postglaciale
marne Afleijringer. Kystterrasser og
Strandlinjer i Island. Geografisk Tid-
skrift XI, 209-225.
— 1901: Geological map of Iceland.
Carlsberg Fund.
— 1904: Fornar sævarmenjar á íslandi.
Úr Þættir úr jarðfræði Islands 5. And-
vari, 35-78. '
— 1905 a: Landskjálftar á Suðurlandi.
Hið íslenska bókmenntafélag, 269
bls.
— 1905 b: Island. Grundriss der Geo-
graphie und Geologi. Petermand
Mitteilungen 119—153, 1—11, 358 Itls.
— 1908-1911: Lýsing íslands, I—IV,
1038 bls.
— 1913-1915: Ferðabók, 1—IV, 1304
bls.
Torfason, Halldór, 1974: Skorradalur —
Andakíll, landmótun og laus jarðlög.
Háskóli Islands, Verkfræði- og raun-
vísindadeild (vélrituð prófritgerð), 30
bls.
Þórarinsson, Sigurður, 1955: Nákuðungs-
lögin í ljósi nýrra aldursákvarðana.
Náttúrufr. 25, 172-186.
Þorkelsson, Þorkell, 1935: Old Shorelines
in Iceland and Isostasy. Greinar Vís-
indafél. ísl. I, (1), 7 bls.
Winkler, G. G., 1863: Island, der Bau
seiner Gebirge.
S U M M A R Y
Discovery sites o£ Late and Post-
glacial fossil shells in Iceland
by Sigriður Friðriksdóttir
Museum of Nalural History,
P. O. liox 5320 Reykjavik, Iceland.
The present paper lists all sites, known
to the author, at which postglacial fossil
shells have been found in Iceland. This
is based on material in the collection of
the Museum of Natural Hitsory in
Reykjavík and published works. A few
dubious records liave been omitted.
l’he geographical locations ot shell beds
are presented in four maps, witli two lists
indicating the exact localities.
On the maps, circles indicate localities
from which there are specimens available
in the Museum collection. These are 135
sites, listed on pp. 78—82. Triangles, on
the other hand, indicate localities men-
tioned in references only. These sites are
40 in number, and are listed on pp. 82—
83.
During postglacial tirnes, the maximum
sea-level attained (compared to present-
day situation) is around 100—120 m, cor-
responding to shaded areas on the maps.
A review is made of C14-datings of Ice-
landic lbssil shells. The datings lall into
four distinct age groups: 12.800—12.100
years (Older Dryas), around 11.600 (Alle-
röd), 10.400—7.700 (Younger Dryas), and
around 5.000 (Nucella lapillus strata).
All the shell species involved, except
Portlandia arctica, are still found around
the coast of Iceland, although distribution
of some of them (e.g. Cardium elegantul-
um) has changed.
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