Deposition during the Triassic continued in the basinal areas developed during the Permian, but in Early Triassic the highs were also gradually covered by sediments. The pattern of sedimentation in the two mega-basins is analogous to that of the Rotliegendes, i.e. with a pronounced, more coarse-grained elastic infill in the northern basin (fig. 20). The Triassic represents a regressive period in the North Sea area, with dominant continental sedimentation of sandstone, shale, and evaporites in red bed facies. Strong subsidence is recorded in the center of the Danish Subbasin with more than 5000 m Triassic sediments, and in the Horn Graben with approximately 3000 m. In the Danish Central Graben the Triassic has not yet been mapped, but thicknesses of about 2000 m or more are expected locally.
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