Palynology of the interval 1335.47 to 1353.04 m of well 205/21-1A, Faroe-Shetland Basin

As part of Phase 3 of the BGS Faroe-Shetland Consortium project on the Jurassic of the UK sector of the Faroe-Shetland Basin, detailed logging of core from well 205/21-1A was undertaken and samples were taken for palynology in order to provide additional facies information and age determinations. A Cretaceous age is indicated for sample 1 (1335.47 m) and a Late Jurassic to Cretaceous age is assigned to sample 3. The dinoflagellate assemblage from sample 4 indicates a late Albian to Cenomanian age (mid to Late Cretaceous) (Costa and Davey, 1992, Williams et al., 2017). However, this age is anomalous when viewed in the context of the overlying and underlying samples and the wireline logs. The sample was obtained from bagged rubbly core so ‘core jumbling’ on the rig or during curation is a likely source of the anomaly. The lowest six samples from this well – samples 5 to 10 (1344.19 to 1353.04 m) – did not yield any agediagnostic palynomorphs.