Paleoenvironmental and Paleoclimatic Reconstruction of the Maastrichtian: Implication from Mamu Formation, South-West, Nigeria

ABSTRACT

This research investigates the palynomorph and palynofacies assemblages within the Maastrichtian Mamu Formation, Anambra Basin, shedding light on the vegetation and ecological conditions during this period. The diverse taxa identified, including Arecipites sp., Dictyophyllidites harissii, Monocolpites marginatus, Proxapertites operculatus, and Longapertites marginatus, reveal the prevalence of specific plant groups, offering valuable paleoenvironmental insights. Additionally, the presence of Amaranthaceae and Cyperaceae indicates wetland or marshy environments. Our study suggests a stable and diverse ecosystem with moderate temperatures and sufficient precipitation during the Maastrichtian in the Anambra Basin. The identification of terrestrial palynomorphs also hints at significant hydrocarbon potential within the Mamu Formation, warranting further investigation. Overall, this research contributes to our understanding of the Maastrichtian paleoenvironment and global changes during this critical phase of Earth’s history. In conclusion, our study provides significant insights into the paleoenvironment and paleoclimate of the Maastrichtian in the Mamu Formation, Anambra Basin. The diverse palynomorph assemblage, along with the identification of specific palynofacies indicators, enables a robust reconstruction of the paleoflora, paleoenvironmental conditions, and hydrocarbon potential within the formation. These findings contribute to our understanding of past global changes during this critical phase of Earth’s history and have implications.

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