Plankton stratigraphy of the Early and Middle Miocene Kareem and Rudeis Formations in the central part of the Gulf of Suez, Egypt

The planktonic foraminifera and nannofossils of three wells in the Gulf of Suez penetrating the Early to Middle Miocene Upper Rudeis and Kareem Formations are attributed (from top to base) to the Middle Miocene Globorotalia peripheroronda Partial Range Zone (M6), the earliest Middle Miocene Praeorbu...

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Bibliographic Details
Published in:Historical biology 2012-02, Vol.24 (1), p.49-62
Main Authors: Boukhary, Mohamed, Abd El Naby, Ahmed, Faris, Mahmoud, Morsi, Abdelmohsen
Format: Article
Language:English
Subjects:
calcareous nannoplankton
Early/Middle Miocene
Egypt
Foraminifera
Globigerinoides
Globorotalia
Gulf of Suez
Helicosphaera
planktonic foraminifera
Praeorbulina glomerosa
Rudeis and Kareem Formations
Sphenolithus
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Summary:The planktonic foraminifera and nannofossils of three wells in the Gulf of Suez penetrating the Early to Middle Miocene Upper Rudeis and Kareem Formations are attributed (from top to base) to the Middle Miocene Globorotalia peripheroronda Partial Range Zone (M6), the earliest Middle Miocene Praeorbulina sicana-Orbulina suturalis Interval Zone (M5), subdivided into the Praeorbulina glomerosa s. strict.-O. suturalis Interval Subzone (M5b) and the P. sicana-P. glomerosa s. str. Interval Subzone (M5a) and the Early Miocene Globigerinoides bisphericus Partial Range Subzone (M4b). The appearance of O. suturalis at the base of Subzone M5b represents the final stage of evolution of the Globigerinoides trilobus-Praeorbulina-Orbulina Lineage. In addition, the calcareous nannoplankton assemblages indicate the Sphenolithus heteromorphus Zone (NN5) and the Helicosphaera ampliaperta Zone (NN4). These biozones are well correlatable with those established by El-Heiny and Martini (1981, Geol Mediterr. Tome, VIII(2): 101-108) from the southwestern flank of the Gulf of Suez.
ISSN:0891-2963
1029-2381
DOI:10.1080/08912963.2011.578877