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.