The new Grødeland borehole penetrates 124.5 m of Pleistocene sediments at the coast of Jæren. Amino-acid analysis suggests that the succession is of Saalian to Weichselian age. Six major units dominated by tills, glaciomarine and marine deposits were recovered: Unit 1 rests on crystalline bedrock and comprises 42 m of subglacial till. Unit 2 comprises silty and sandy sediments deposited in a glaciomarine environment, grading into normal marine and back to glaciomarine conditions before deposition of the overlying till (unit 3). Unit 3 is 32 m thick subglacial till. Unit 4 was deposited in a shallow glaciomarine environment. The succession is capped by the uppermost subglacial till (unit 5) of assumed Early Weichselian age, and a Holocene beach deposit. The stratigraphy is compared with the classic results from the Grødeland coring carried out at this site in 1874.
Juraj Janocko, University of Tromsø, Department of Geology, IBG, N -9037 Tromsø, Norway;
Jon Y. Landvik, The University Courses on Svalbard (UNJS), PO Box 156, N-9170 Langyearbyen, Norway;
Eiliv Larsen, Geological Survey of Norway, PO Box 3006, N-3006 Trondheim, Norway;
Hans Petter Sejrup, University of Bergen, Department of Geology, Allégt. 41, N-5007 Bergen, Norway.