--> A Dinocyst Biozonation Framework for Cretaceous and Tertiary Sediments in Benin-1 Well, Benin Flank, Southern Nigeria, by Anthonia Nwaneze Asadu and Franklin Adebayo Lucas; #90037 (2005)
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A Dinocyst Biozonation Framework for Cretaceous and Tertiary Sediments in Benin-1 Well, Previous HitBeninNext Hit Flank, Southern Nigeria

Anthonia Nwaneze Asadu and Franklin Adebayo Lucas
University of Previous HitBeninNext Hit, Previous HitBeninTop city, Nigeria

Sixty biostratigraphically significant dinoflagellate cyst species were recovered from intervals 2340ft 6381ft of Benin-1 well. On the basis of the first and last stratigraphic occurrences (FAD's & LAD's) of these bioevents, a total of fifteen informal dinocyst zones were erected and used to delineate five geologic boundaries from Maastrichtian to Lutetian. The zones are from bottom to the top Manumiella seelandica-biozone A, Fibrocysta bipolare-biozone B, Dinogymnium acuminatum-biozone C, Carpatella cornutabiozone D, Cribroperidinium sepimentum-biozone E, Kleithriasphaerdium diverspina-biozone F, Danea Californica-biozone G, Apectodinium hyperacanthum-biozone H, Eisenackia crassitabulata-biozone I, Homotryblium tennuispinosum-biozone J, Fibrocysta lappacea-biozone K, Diphyesficusoides-biozone L, Glaphyrocysta SPB -biozone M, Muratodinuim fimbriatum-biozone N and Impletpsphaeridium sp-biozone O. This Biozonation framework has been compared with other biozonation schemes from other parts of the world and also has biostratigraphic utility for the recognition of all the geologic boundaries between Maastrichtian and Lutetian.