Bio-Sequence Stratigraphy of Shagamu Quarry Outcrop, Benin Basin, Southwestern Nigeria
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Date
2012
Authors
Adeonipekun, P. A.
Ehinola, O. A.
Toluhi
Yussuph, I. A.
Toluhi, A.
Oyelami, A.
Journal Title
Journal ISSN
Volume Title
Publisher
International Digital Organization for Scientific Information
Abstract
Abstract: The Paleocene/Eocene boundary has been a significant subject globally for sometimes now. This
work focuses on the application of sequence stratigraphy where diagnostic microfossils trends of abundances
and qualitative parameters can be integrated with sedimentology in the recognition of stratigraphic surfaces.
Such surfaces / boundaries are highstand systems tract (HST), transgressive systems tract (TST), lowstand
systems tract (LST), maximum flooding surface (MFS) / condensed section (CD) and sequence boundary (SB).
These will no doubt provide an excellent opportunity for the identification of a functional boundary in a fairly
assemblage-rich basin. 14 outcrop samples from the Shagamu Quarry were studied for their palynomorphs and
foraminifera. Correlation with previous works on nannofossils and palynomorphs was also carried out to aid
interpretations. Systems tracts and surfaces recognized and proposed for the study area are: HST (4.2-7.1 m,
9.5-11.5 m and 26.8-28.0 m), TST (7.7-9.5 m, 11.5-19.0 m, 19.0-20.2 m {TST/CD)}), LST (1.3-4.2 m and 20.2-26.8 m),
MFS (56.8, 58.1 and 59.7 Ma) and SB (56.5, 57.0, 57.5 and 60.4 Ma. Depositional environments varied from inner
to outer neritic settings. This study will aid exploration efforts not only in the onshore but also in offshore
settings where sizeable sections have been reported missing.
Description
Keywords
Bio-sequence stratigraphy, Palynomorph, Foraminifera, sedimentology
Citation
Adeonipekun, P. A., Ehinola, O. A., Yussuph, I. A., Toluhi, A. and Oyelami, A. (2012). Bio-Sequence Stratigraphy of Shagamu Quarry Outcrop, Benin Basin, Southwestern Nigeria. World Applied Sciences Journal 18 (1): 91-106