The North Sea Basin: Middle and Late Paleocene (Selandian and Thanetian)
2016. "The North Sea Basin: Middle and Late Paleocene (Selandian and Thanetian)", A revised correlation of Tertiary rocks in the British Isles and adjacent areas of NW Europe, C. King, A. S. Gale, T. L. Barry
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The Danian-Selandian boundary is well defined throughout the North Sea Basin, as discussed in Chapter 8, although there is some ambiguity in the dating of some marginal non-marine units close to the boundary. The Selandian-Thanetian boundary has been directly identified by magnetostratigraphy only in East Anglia (southern England). The Thanetian-Ypresian (Paleocene-Eocene) boundary is well defined by the isotopic and biotic response to the PETM (Paleocene-Eocene Thermal Maximum). In the centre of the Basin and adjacent areas, it is apparently conformable. However, in more proximal settings, including all onshore areas, there is a hiatus or disconformity at this level (Fig. 51).