Fróðskaparrit - 01.01.1998, Qupperneq 332

338 ICELANDIC TEPHRAIN LATE-GLACIAL SEDIMENTS OF SCOTLAND (14-9,00014C BP)
Fe0tot(wt%)
Figure 2: Temary plot ofFe2, K20 and CaO
composition oftephra shards analysed from all six
sites illustrating the geochemical distinction between
the Vedde Ash and the Borrobol Tephra.
Mynd 2: Trískift strikumynd av Fe2, K20 og CaO
samansetingum av tefrubrotum, sum eru greinað úr
øllum seks støðum og vísa tann jarðevnafrøðiliga
munin millum Vedde-øskuna og Borrobol-tefruna.
Sites: 1 Borrobol 4 Whitrig Bog
2 Tanera More 5 Muir Park Reservoir
3 Tynaspirit West 6 Kennethmont
at Saksunarvatn, Streymoy. It appears that
the Faroe Isles had a parochial ice cap dur-
ing the Last (Weichselian) Glaciation and
only small corrie glaciers existed during the
cold periods that interrupted the general
warming that led to deglaciation (e.g.
Younger Dryas Chronozone of NW Eu-
rope) (Geike, 1880; Humlum et al., 1996).
It is therefore likely that some sediment se-
quences have developed on parts of the
Faroes which extend through the Late-
glacial period, and these may contain trace-
able quantities of the three main tephras re-
ferred to above: Vedde, Borrobol and Sak-
sunarvatn. Other, as yet undiscovered
tephra layers, some of which may equate
with other components of the NAAZO,
could also be found on the Faroe Islands.
Acknowledgements
This research was funded by NERC grant GST/02/721
in the ‘TIGGER’ Special Topic and also by NERC Stu-
dentships to CSMT (ref no. GT4/94/3651G) and SJR
(ref no.GNT25-30/9) for which we are grateful. Thanks
to Oikos for additional funding. Particular thanks to Dr.
Peter Hill and Simon Burgess at the Department of Ge-
ology, University of Edinburgh and Nick Branch, Jerry
Lee, Dr. Stefan Wastegard and everyone at Royal Hol-
loway, University of London for fielđ and laboratory as-
sistance. We thank also Dr Andrew Haggart (Royal Hol-
loway and Greenwich), Dr. Richard Tipping (Universi-
ty of Stirling), Professor Alastair Dawson (Coventry
University) for access to core material. Thanks to Dr
Andrew Dugmore for reading early drafts and suggest-
ing many important improvements.
References
Austin, W. E ,N., Bard, E., Hunt, J. B., Kroon, R. and
Peacock, J. D. 1995. The 14C age of the Icelandic
Vedde Ash: Implications for Younger Dryas marine
reservoir age corrections. Radiocarbon 37, 53-62.
Bard, E., Arnold, M., Mangerud, J., Pateme, M,
Labeyrie, L., Duprat, J., Melieres, M.-A., Sønste-
gard, E. and Duplessy, J.C. 1994. The North At-
lantic atmosphere-sea-surface 14C gradient during
the Younger Dryas climatic event. Earth and Plane-
tary Science Letters 126: 275-287.
Bennett, K. D., Boreham, S., Sharp, M. J. and Switsur,
V. R. 1992. Holocene history of environment, vege-
tation and human settlement on Catta Ness, Lunnas-
ting, Shetland. Journal ofEcology 80, 241-273.
Birks, H.H., Gulliksen, S., Halflidason, H., Mangerud,
J., and Possnert, G. 1996. New radiocarbon dates for
the Vedde Ash and the Saksunarvatn Ash from Nor-
way. Quaternary Research 45, 119-127.
Bjðrck, S., Ingolfsson, O., Haflidason, H., Hallsdottir,
M., and Anderson, N.J. 1992. Lake Torfadalsvatn:a