5. Discussion
The three GCs record a coherent signal of significant changes in geochemical ratios and abundances of palynomorphs and planktonic foraminifera that correlate with the effects of the transition from low sea level (phase I) to sea level rise (phase II) on the coastal margin of the Niger Delta. This change in sea level has been reported elsewhere especially along the West equatorial African margin (Lézine, 1997; Scourse et al., 2005; Adeonikpekun and Sowunmi, 2019). In addition, these phases record transitions between seasonal variations in vegetation dynamics, sediment supply, catchment preferences, and climate change in the Niger Delta.