| Summary: | Firteen samples (13) of drill cuttings ranging from 2630 m to 2400 m were subjected to biostratigraphic analysis to determine the age andthe sediment deposition environment from KES-1 drilling. KES-1 is located in the submerged (offshore) part of the sedimentary basin of Côte d’Ivoire. Sorting revealed the presence of 1003 individuals, of which 831 planktonic foraminifera represented 82.85%, 98 benthos forglenids agglutinated or 9.77% and 74 calcareous benthic foraminifers, or 7.38%. These foraminifers have been identified and used for dating formations traversed by drilling. Thus, on the basis of the first or the last appearances of planktonic foraminifers and microfaunistic associations, the determined ages are the Cenomanian, the Turonian and the Lower Senonian (Coniacian). The diversity of planktonic foraminifers and the presence of benthic foraminifers has allowed the paleoenvironmental reconstitution of the seabed from internal neritic to lower bathyal type.
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