Foraminiferal distribution in the western Barents Sea, Recent and Quaternary

Article English OPEN
L. Østby, Kirsten ; Nagy, Jenö (1982)

Foraminiferal faunas were analysed from 22 cores (length 30-165 cm), three grab samples and one dredge sample taken from Spitsbergenbanken and the trenches Storfjordrenna and Bjørnøyrenna. The distribution pattern of selected taxa and eight assemblages are discussed in relation to water depth, currents and sedimentation. The assemblages found on Spitsbergenbanken where currents are particularly active, are clearly different from the assemblages occurring in the more quiet environments of the trenches. In the Quaternary evolution of the area three successive stages are distinguished: glacial shelf environment of the Weichselian; semiglacial, or transitional environment of the Late Weichselian and Early Holocene; open, or deglaciated shelf environment of the Holocene. Minor faunal changes in Storfjordrenna are explained by changes in the current pattern. In some assemblages marked postmortem changes have taken place which include solution of calcareous shells, breakage and abrasion by currents, and transport of shells out of the high energy bank area with assumed redeposition in deeper water.
  • References (9)

    Bjerlykke, K., B. Bue, and A. Elverhei, 1978: Quaternary sediments in the northwestern part of the Barents Sea and their relation to the underlying Mesozoic bed rock. Sedimentology 2 5 . 227-246.

    Boulton, G.S., 1979: Glacial history of the Spitsbergen archipelago and the problem of a Barents Shelf ice sheet. Boreas 8 ( 1 ) : 31-57.

    Burmistrova, I I., 1967: Modem distribution of Foraminifera and stratigraphy of the Late Quaternary sediments in the Barents Sea. Okeanologiya 2 : 302-208. (Text in Russian, English summary).

    Cushman, J.A., 1948: Arctic Foraminifera. Cushman Lab. Forum. Res., spec. Publ. 23. 80 pp.

    Elverhei, A. and K. Bomstad, 1980: Latc Weichselisn glacial and marine sedimentation in the western, central Barents Sea. Norsk Polarinst. Rapport N r . 3. 29 pp.

    Elverhei, A. and Y. Kristoffersen, 1978: Glacial deposits southeast of Bjernnya, northwestern part of the Barents Sea. Norsk Polarinst. Arbok 1977: 209-215.

    Elverhei, A,, 0. Liestsl, and J. Nagy, 1980. Glacial erosiom, sedimentation and microfauna in the inner part of Kongsfjorden, Spitsbergen. Norsk Polarinst. Skrifter. Nr. 172. 33-61.

    Feyling-Hanssen, R.W., 1964: Foraminifera in Late Quaternary deposits from the Oslofjord area. Norges geol. UndPrs. 22.5. 383 pp - 1972: The foraminifer Elphidium cxcavatum (Terquen) and its variant forms. Micropal. 18 (3): 337-354.

    - 1976: A Mid-Wisconsinian Interstadial on Broughton Island, Arctic Canada, and its Foraminifera. Arctic and Alphine Res. 8 ( 2 ) : 161-182.

  • Metrics
    No metrics available
Share - Bookmark