Jökull - 01.12.1988, Side 8

TABLEIV. List of molluscs and localities
Partly based on Askelsson (1934)
and Kjartansson (1958).
TAFLA IV. Listi yfir skeljar og aðrar
lífrœnar leifar og fundarstaði þeirra.
SPECIES/TEGUND
Pododesmus squamula • • • •
Chlamys islandica • • •
Crenella decussata •
Nucula tenuis • •
Nuculana pernula • • •
Mytilus edulis • • •
Tridonta montagui •
Arctica islandica • • • • • • •
Macoma calcarea • • • • • •
Hiatella arctica • • • • • • • •
Panopea norvegica •
Mya truncata • • • • •
Zirfaea crispata •
Puncturella noachina •
Natica pallida •
Natica ajfnis •
Boreotrophon clathratus • •
Buccinum undatum •
Thracia myopsis • •
Balanus sp. • • • • • • • • • • • •
Bryozoa • • •
Crustacea fragments • •
Mollusca fragments, unidentified • • • • •
HREPPHÓLAR (Lu-2401, Lu-2402)
Close to Hrepphólar the river Stóra-Laxá has
found its way through the Búði moraines, at about
65 m a.s.l. The section exposed in the northem bank
is about 1000 m long and c. 20 m high (Fig. 5). The
following stratigraphy was observed:
Lowest is unit A which consists of silty diamic-
ton, irregularly stratified, with abundant outsized
clasts which are rich in rhyolite. It resembles the
Búðaberg diamicton, but contains more dropstones.
In the section this unit has a ridge-like appearance,
with maximum thickness of c. 15 m. The diamicton
has been deformed by a glacial push. Fragments of
Balanus sp. are widespread in the diamicton. A
radiocarbon dating of a Balanus sample gave the
value of 9.745±140 BP (Table II: Lu-2401). This is a
maximum age for the disturbance of this diamicton.
The diamicton is unconformably overlain by unit
B, a 5 m thick unit of crudely stratiíied, coarse
gravel, which constitutes the upper part of the
6 JÖKULL, No. 38, 1988