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2011

Palynostratigraphy and paleoecology of chev-1 well, southwestern Niger delta basin, Nigeria

Author:Adebayo Olufemi Ojo and Olajide Femi Adebayo

Abstract:
Twenty five ditch cutting samples from southwest Niger Delta basin were analysed to determine the palynostratigraphic studies. The samples contained very rich and diverse palynomorphs dominated by pollen grains which consist of 12 species distributed among ten genera. Pollen preservation is good with concentration ranging from 1,640 to 34,900 grains/g. The stratigraphic ranges of Circulina parva, Monoporites annulatus, Psilatricolporites operculatus, Multiareolites formosus, Zonocostites ramonae, Podocarpus milanjianus, Echitricolporites spinosus, Retibrevitricolporites obodoensis, R. protrudens and Retitricolpites bendensis and some other marker species were used to demarcate nine palynozones in the study area. These palynomorphs are mainly made up of mangrove swamp floras which suggest the predominance of a high sea level and wet climatic condition in Miocene-Pliocene during the deposition of the studied sediments.