Sammendrag
A mid-Carboniferous (pre-latest Moscovian) buildup in central Spitsbergen is composed almost entirely of fenestrate bryozoans (13 of 18 species, which contribute almost 100% of bryozoan biomass). Identified species are generally of early to late Carboniferous age, but some have been reported from Permian strata. Fenestrate sheets acted as sediment traps, and fenestrules are in varying degree closed off by initial marine cementation. Buildup development (sedimentation, diagenesis) is like that described from adjacent basins in Canada and eastern North Greenland, but in Spitsbergen the buildups are smaller (20 m thick, 200 m wide).
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