Maastrichtian-Early Eocene litho-biostratigraphy and palaeogeography of the northern Gulf of Suez region, Egypt

The Maastrichtian-Lower Eocene sediments on both sides of the northern Gulf of Suez can be subdivided into eight formal formations (including one grou p) and one informal formation that are described in detail. These lithostra tigraphic units reflect three different environmental regimes of deposition or non-deposition. The first regime is characterised by uplift and erosion or non-deposition resulting mostly from the uplift of the Northern Galala/ Wadi Araba structure, a branch of the Syrian Arc Foldbelt. The shallow wate r carbonate platform and slope deposits of the Late Campanian-Maastrichtian St Anthony Formation and the Paleocene-Lower Eocene Southern Galala and Ga rra Formations represent the second regime and are found north and south of the Northern Galala/Wadi Araba High. The third regime is represented by ba sinal chalks, marls and shales of the Maastrichtian Sudr Formation and of t he Paleocene-Eocene Dakhla, Tarawan and Esna Formations, the Dakhla/Tarawan /Esna informal formation and the Thebes Group. The distribution and lateral interfingering of the above mentioned environmental regimes reflect differ ent vertical movements, changing basin morphology, sea level changes and pr ogradation of shallow water sediments and is illustrated on 11 palaeogeogra phic maps. (C) 2001 Elsevier Science Limited. All rights reserved.