Jökull - 01.12.1989, Page 25

TABLEI. Radiocarbon age of samples from Reykjavík.
TAFLAI. Aldursgreiningar á sýnum frá Reykjavík.
Locality Lab.no. Year Age BP Corr.age BP Ref.
Staður Sýni Greint Aldur Sjávarleiðr. Tilvitnun
Hótel Loftleiðir U-412 1964 10,310+260 9945+260 Olsson and Piyanuj, 1965
Hótel Loftleiðir U-413 1964 9940+160 — Olsson and Piyanuj, 1965
Hótel Loftleiðir U-414 1964 10,450+160 — Olsson and Piyanuj, 1965
Hótel Loftleiðir U-415 1964 10,230+190 9865+190 Olsson and Piyanuj, 1965
Félagsst. stúd. ? ? 11,620+150 — Einarsson, 1987
Nauthólsvík Lu-2599 1987 11,530+100 11,165+100 Hjartarson, 1987
Nauthólsvík AAR-2A 1988 12,360+330 —
Nauthólsvík AAR-2B 1988 11,840+210 —
Nauthólsvík AAR-2C 1988 11,800+150 11,435+150
Nauthólsvík AAR 12 1988 11,330+140 10,965+140
Nauthólsvík AAR-13 1988 11,580+150 11,215+150
Skerjafjörður AAR-6 1988 11,400+160 11,035+160
Skerjafjörður AAR-7 1988 11,380+140 11,015+140
Skerjafjörður AAR-8 1988 11,130+120 10,765+120
Skerjafjörður AAR-9 1988 11,190+270 10,825+270
Skerjafjörður AAR-10 1988 11,170+330 10,805+330
Skerjafjörður AAR-11 1988 11,320+180 10,955+180
Austurströnd AAR-3A 1988 10,290+210
Austurströnd AAR-3B 1988 10,180+150 9815+150
The age calculations are based on Oxalic Acid Factor 0.950 NBS. The half-life of 14C is estimated 5568 years. The age
is in years BP (Present = 1950). The samples have been corrected for l3C/l2C. The age of the sea around Iceland is
estimated 365+20 years (see Hákansson, 1983). Samples AAR-2A and AAR-2B are from the same shell and also sam-
ples AAR-3A and AAR-3B. Where more than one sample has been dated from a shell, the age of the innermost part of
marine part became a solid rock, as the sediments
under the till were kneaded and folded through the
movement of an overriding glacier (Fig. 1). This
excellent exposure into the sediments has recently
been hidden by a new land-fill at the Airport run-
way, that stretches out into the sea in this area.
THE SEDIMENTS AT SKERJAFJÖRÐUR
West of the runway, the Fossvogur layers are not
exposed until just west of the Shell oil supply station
at Skerjafjörður (Fig. 2). There, in a vertical cliff, a
1-2.5 m thick and fairly hard till overlies a thin
the shell is used for the discussion in the paper.
Samples AAR-2A,B,C, AAR-12 and AAR-13 from
Nauthólsvík were taken from unit 2, the shell-richest
unit in the cliff.
Further to the west, along the bank of Fossvogur
close to the Airport runway, additional sedimentary
layers can be seen on top of the Fossvogur layers.
The lowest of these is a layered sediment of sand
and gravel, free of shells. The uppermost part con-
sists of a coarse consolidated till or tillite, which
was deposited by a glacier that covered the area
after the deposition of the marine part of the Foss-
vogur layers. This must have taken place before the
JÖKULL, No. 39, 1989 23