登入選單
返回Google圖書搜尋
Cretaceous Palynostratigraphy of Offshore Southeastern Canada: The evaporites of the Ordovician Baumann Fiord Formation, Ellesmere Island, Arctic Canada
註釋"Palynology is one of the few techniques available for subdivision and age correlation of the subsurface sediments of offshore southeastern Canada. The Cretaceous of this area is subdivided into eleven palynological zones which are tentatively related to the standard European stage terminology. The Scotian Shelf-Grand Banks Cretaceous differs laterally in its development, being fairly complete on the Scotian Shelf, but having most of the Lower Cretaceous absent over the central Grand Banks and Upper Cretaceous absent from some of the eastern Grand Banks wells. Where present, Lower Cretaceous-Cenomanian sediments are considerably thicker than post-Cenomanian Cretaceous sediments in both areas. Dinocyst species diversity is fairly uniform throughout the Cretaceous, peaking in the Albian (70 species) and being much reduced in the Berriasian (37 species) and Aptian (42 species)." --