Eocene Chemo-litho-facies
maps and significance to depositional pattern, Nile Valley, Egypt.
Mahmoud M. Hassann, M.H. Mohamed, M.H.
Hathout1 and S. M. Abd El Moneim2
Fac. Sciences, Al-Azhar Univ., Cairo, Egypt, 1Fac.
Sciences, Menoufia Univ., Shibein ElKom;
2National Cement Co., Cairo, Egypt . |
This work is intended at reviewing the results of 28 previously studied Eocene
stratigraphic sections
and 515 chemical analyses made for their rocks by the present authors for the sake of
presenting a new
contribution and approach as to the Eocene depositional pattern in the Nile valley.
Through construction of chemo-lithofacies maps for the Lower, Middle and Upper Eocene, a
more
comprehensive correlatable neritic environmental setting is figured. Changes occurred both
laterally in space
and vertically in the stratigraphic column. The results attained by the present treatment
conform well with the
field and petrographic findings. The study further shows that the CaO/MgO ratio can be an
indicator to the
nature of the depocenter.
Combining all the data, a proposed composite succession of the Eocene is constructed. This
succession
may show more practicability than previously compiled ones.
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