Abstract
The Lower Tertiary tuffaceous Balder Formation is described on the basis of a 16-m long core from well 30/2–1 in the north Viking Graben. The core comes from a 47-m thick main tuff-zone within the 76–m thick formation. It contains 168 tuff-beds which comprise 44% of the sediment volume. The beds are 0–28-cm thick, graded (FU) and represent first-generation ash deposits. They result from explosive eruptions of magma with a composition transitional between within plate and mid-ocean ridge basalt.
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Malm, O.A., Christensen, O.B., Furnes, H., Løvlie, R., Ruselåtten, H., Østby, K.L. (1984). The Lower Tertiary Balder Formation: An organogenic and tuffaceous deposit in the North Sea region. In: Spencer, A.M. (eds) Petroleum Geology of the North European Margin. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-5626-1_11
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DOI: https://doi.org/10.1007/978-94-009-5626-1_11
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