Graham Bliss

IHS · Upstream Research

The Palaeocene of the North Sea basin between 58°N and 62°N contains a number of reservoir sands. The regional tectonic setting, which was dominated by subsidence in the Viking Graben and Witch Ground Graben areas had an important influence on the thickness and distribution of the Palaeocene sands. Following deposition of the Danian, middle Palaeoc...

The supposed worm burrows from the South Stack Group have been interpreted as dewatering structures. The stromatolites from the melange are identified as the Vendian- Cambrian form Georninia, and microfossils from the Llanddwyn Spilitic Group give a Lower Cambrian age for theGwna Group.

In view of the continuing controversy about the biogenicity of structurally preserved carbonaceous remains in Archaean rocks, carefully selected samples from the Onverwacht Group, 3.355 X 109 years old, of South Africa, have been subjected to stringent morphological and statistical tests. The same tests have been applied to other samples from rocks...