Integrated Stratigraphy (Bio- and Sequence Stratigraphy) and Facies Analysis of the Upper Cenomanian–Turonian (Lower Upper Cretaceous) in the Eastern Desert, Egypt

2014 ◽  
pp. 619-622
Author(s):  
Markus Wilmsen ◽  
Emad Nagm
Keyword(s):  
Sequence Stratigraphy ◽  
Upper Cretaceous ◽  
Facies Analysis ◽  
Eastern Desert ◽  
Lower Upper ◽  
Integrated Stratigraphy

Late Cenomanian–Turonian (Cretaceous) ammonites from Wadi Qena, central Eastern Desert, Egypt: taxonomy, biostratigraphy and palaeobiogeographic implications

2012 ◽  
Vol 62 (1) ◽  
pp. 63-89 ◽  
Author(s):  
Emad Nagm ◽  
Markus Wilmsen
Keyword(s):  
West Africa ◽  
Late Cretaceous ◽  
Upper Cretaceous ◽  
Eastern Desert ◽  
Lower Upper ◽  
Central Eastern Desert ◽  
Wadi Qena ◽  
Central Eastern ◽  
First Time

ABSTRACT Nagm, E. and Wilmsen, M. 2012. Late Cenomanian-Turonian (Cretaceous) ammonites from Wadi Qena, central Eastern Desert, Egypt: taxonomy, biostratigraphy and palaeobiogeographic implications. Acta Geologica Polonica, 62 (1), 63-89. Warszawa. In Egypt, marine Upper Cenomanian-Turonian strata are well exposed in the Eastern Desert. The southernmost outcrops are located in the central part of Wadi Qena, where the lower Upper Cretaceous is represented by the fossiliferous Galala and Umm Omeiyid formations. From these strata, numerous ammonites have been collected bed-by-bed and 13 taxa have been identified, which are systematically described herein. Four of them (Euomphalocerascostatum, Vascoceras globosum globosum, Thomasites gongilensis and Pseudotissotia nigeriensis) are recorded from Egypt for the first time. The ammonite ranges are used for a biostratigraphic zonation of the lower Upper Cretaceous succession in the northern and central part of Wadi Qena: the Upper Cenomanian-Lower Turonian has been subdivided into five biozones (including a new upper Lower Turonian biozone based on the occurrence of Pseudotissotia nigeriensis), and one biozone has been recognized in the Upper Turonian. Palaeobiogeographically, the ammonite assemblage has a Tethyan character. During the Early Turonian, influences of the Vascoceratid Province were predominant with strong affinities to typical Nigerian faunas. This shows the significance of faunal exchange between Egypt and Central and West Africa via the Trans-Saharan Seaway. Compared to contemporaneous ammonoid faunas from the northern part of the Eastern Desert, Boreal influences are much less obvious in Wadi Qena. Thus, the present study greatly enhances the knowledge of the Late Cretaceous palaeobiogeography and biostratigraphy of Egypt and adjacent areas.

Silicified sea life – Macrofauna and palaeoecology of the Neuburg Kieselerde Member (Cenomanian to Lower Turonian Wellheim Formation, Bavaria, southern Germany)

2013 ◽  
Vol 63 (4) ◽  
pp. 555-610 ◽  
Author(s):  
Simon Schneider ◽  
Manfred Jager ◽  
Andreas Kroh ◽  
Agnes Mitterer ◽  
Birgit Niebuhr ◽  
...  
Keyword(s):  
Sequence Stratigraphy ◽  
Marine Environment ◽  
Upper Cretaceous ◽  
Soft Bottom ◽  
Southern Germany ◽  
Bottom Community ◽  
Lower Upper ◽  
Fossil Assemblage

ABSTRACT Schneider, S., Jager, M., Kroh, A., Mitterer, A., Niebuhr, B., Vodražka, R., Wilmsen, M., Wood, C.J. and Zagoršek, K. 2013. Silicified sea life - Macrofauna and palaeoecology of the Neuburg Kieselerde Member (Cenomanian to Lower Turonian Wellheim Formation, Bavaria, southern Germany). Acta Geologica Polonica, 63(4), 555-610. Warszawa. With approximately 100 species, the invertebrate macrofauna of the Neuburg Kieselerde Member of the Wellheim Formation (Bavaria, southern Germany) is probably the most diverse fossil assemblage of the Danubian Cretaceous Group. Occurring as erosional relicts in post-depositional karst depressions, both the Cretaceous sediments and fossils have been silicified during diagenesis. The Neuburg Kieselerde Member, safely dated as Early Cenomanian to Early Turonian based on inoceramid bivalve biostratigraphy and sequence stratigraphy, preserves a predominantly soft-bottom community, which, however, is biased due to near-complete early diagenetic loss of aragonitic shells. The community is dominated by epifaunal and semi-infaunal bivalves as well as sponges that settled on various (bio-) clasts, and may widely be split into an early bivalve-echinoid assemblage and a succeeding sponge-brachiopod assemblage. In addition to these groups we document ichnofauna, polychaete tubes, nautilids and bryozoans. The fauna provides evidence of a shallow to moderately deep, calm, fully marine environment, which is interpreted as a largescale embayment herein. The fauna of the Neuburg Kieselerde Member is regarded as an important archive of lower Upper Cretaceous sea-life in the surroundings of the Mid-European Island.

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