Palynological age constraints on the base of the Helvetiafjellet Formation (Barremian) on Spitsbergen

  • Karl Grøsfjeld

Abstract

The age of the uppermost part of the Rurikfjellet Member, Janusfjellet Formation, underlying the Helvetiafjellet Formation, is discussed on the basis of the occurrence of dinoflagellate cysts. Samples collected from thirteen localities in western and central Spitsbergen were examined. Forty-eight dinoflagellate cyst species were recorded during the study, but only a few provide good time resolution. They show that the youngest beds of the Rurikfjellet Member, previously regarded to be of Hauterivian age, belong to the Barremian. The presence of Barremian sediments below the base of the Helvetiafjellet Formation at several widely separated localities constrains the diachronism of the Rurikfjellet Member -Helvetiafjellet Formation transition.

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Published
1992-01-06
How to Cite
Grøsfjeld K. (1992). Palynological age constraints on the base of the Helvetiafjellet Formation (Barremian) on Spitsbergen. Polar Research, 11(1), 11-19. https://doi.org/10.3402/polar.v11i1.6713
Section
Research/review articles