CENOZOIC STRATIGRAPHY OF THE NORWEGIAN SEA CONTINENTAL-SHELF, 64-DEGREES-N-68-DEGREES-N

This investigation is based on six exploration wells: 6607/5-1 and /5- 2 (Utgard High), 6506/12-4 (Halten Terrace), 6610/7-1, 6610/7-2 and 66 10/3-1 (Nordland Ridge). Fifteen informal fauna zones are outlined. Th ick, glacially derived Pleistocene and Upper Pliocene prograding shelf deposits extend along the continental margin of the Norwegian Sea. In well 6607/5-1 and 6506/12-4 Upper Pliocene outer to middle shelf depo sits tie unconformably on Upper Miocene outer shelf deposits, which ar e well developed in these areas. A thin interval of Middle Miocene out er shelf sediments is present in well 6607/5-1. This rests unconformab ly upon Lower/Middle Eocene middle to outer shelf deposits, which in t urn rest unconformably upon the Upper Cretaceous. In well 6506/12-4, t he Upper Miocene rests unconformably on outer to middle shelf sediment s from the Upper Oligocene/Lower Miocene, which in turn lie unconforma bly on the Lower/Middle Eocene. In well 6607/5-2 Upper Pliocene outer shelf sediments lie unconformably on the Lower/Middle Eocene. Wells 66 10/7-1 and /7-2 on the Nordland Ridge penetrate the proximal, oldest p arts of the glacially derived prograding sediments of Late Pliocene ag e, which in this area are middle to inner shelf deposits. In addition, wells 6610/7-1 and 6610/3-1 penetrate underlying Early Oligocene coas tal deposits. Lower/Middle Eocene sediments lie below the coastal depo sits in well 6610/7-1. In well 6610/7-2 Upper Pliocene deposits lie un conformably upon low oxic deep basin sediments from the Upper Paleocen e. Seismic profiles through this area show that the Upper Pliocene gla cial deposits onlap the Lower Oligocene coastal deposits.