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Abstract
SUMMARY AND CONCLUSION
The studied Jurassic succession lies in the subsurface of the area located to the North of Cairo-Suez stretch, the selected succession is that which penetrated by R-69-1 well section at Lat. 30, 14, 50 N and Long. 31, 33,10 E. This Jurassic well section begins by the Lower Jurassic with unreached base and followed unconformably by Lower Cretaceous sediments.
The present work was planned to study the microfossil content of this Jurassic succession in order to define its microbiozones and chronostratigraphic units with the lithostratigraphic differentiation ; the microfossil types intended to be studied here are the foraminiferal fauna with the palynological microflora represented by pollens , spores and dinofelagellates. In this study there is a try to make biostratigraphical correlation and calibration for the resulted biozones of these microbiotal types. Paleoenvironmental interpretations were carried out depending on all available information from lithologies and microfossils.
The studied rock samples (cuttings) were prepared for lithostratigraphic and microfossil investigations, and all other following steps, these were summarized in the introduction. Results of the present study are briefly recorded in the following paragraphs.
The strata lying between depth 2489 m and 905 m in R-69-1 well, have been ascribed to the Jurassic depending on their foraminiferal and palynomorphous fossil content and correlating them with the similar associations which are known in many Egyptian Jurassic sections.