Fig. 3 in Biozonation And Correlation Of Two Wells In Niger Delta Using Calcareous Nannofossils

Fig. 3. Microphotographs at LM (light microscope) of the calcareous nannofossils identified in the two studied wells; scale bar 9 microns. a Helicosphaerea sellii Bukry and Bramlette; b Reticulofenestra pseudoumbilicus> 7 microns (Gartner) Gartner; c Calcidiscus tropicus (Kamptner) Gartner; d Discoaster brouweri (Roth and Hay in Hay et al.) Bukry; e Ceratolithus armatus (Muller, 1974); f Sphenolithus abies Deflandre in Deflandre and Fert; g Discoaster berggrenii Bukry; h Ceratolithus cristatus (Young, 1998); i Calcidiscus leptoporus (Murray and Blackman) Loeblich and Tappan; j Pontosphaera multipora (Kamptner ex Deflandre in Deflandre and Fert) Roth, 1970); k Discoaster pentaradiatus Tan; l Coccolithus pelagicus (Wallich) Schiller; m Discoaster hamatus Martini and Bramlette; n Cyclicargolithus floridanus (Tan) Bramlette and Riedel; o Helicosphaera carteri (Wallich) Kamptner; p Sphenolithus moriformis (Brönnimann and Stradner) Bramlette and Wilcoxon; q Pontosphaera discopora Schiller; r Discoaster quinqueramus Gartner; s Reticulofenestra haqii Backman; t Calcidiscus macintyrei (Bukry and Bramlette) Loeblich and Tappan.