The Dababiya corehole, Upper Nile Valley, Egypt: Preliminary Results ...

• Main Authors: Berggren, William A., Alegret, Laia, Aubry, Marie-Pierre, Cramer, Ben, Dupuis, Christian, Goolaerts, Sijn, Kent, Dennis V., King, Christopher, O’B. Knox, Robert, Obaidalla, Nageh, Ortiz, Silvia, Ouda, Khaled, Abdel-Sabour, Ayman, Salem, Rehab, Senosy, Mahmoud, Soliman, Mamdouh, Soliman, Ali
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: Columbia University 2012
• Subjects: Paleontology; Geology; FOS: Earth and related environmental sciences; Planktonic foraminifera
• Online Access: https://dx.doi.org/10.7916/d8n58x36; https://academiccommons.columbia.edu/doi/10.7916/D8N58X36

The Dababiya corehole was drilled in the Dababiya Quarry (Upper Nile Valley, Egypt), adjacent to the GSSP for the Paleocene/ Eocene boundary, to a total depth of 140 m and bottomed in the lower Maastrichtian Globotruncana aegyptiaca Zone of the Dakhla Shale Formation. Preliminary integrated studies on calcareous plankton (foraminifera, nannoplankton), benthic foraminifera, dinoflagellates, ammonites, geochemistry, clay mineralogy and geophysical logging indicate that: 1) The K/P boundary lies between 80.4 and 80.2 m, the Danian/Selandian boundary between ~ 41 and 43 m, the Selandian/Thanetian boundary at ~ 30 m (within the mid-part of the Tarawan Chalk) and the Paleocene/Eocene boundary at 11.75 m (base [planktonic foraminifera] Zone E1 and [calcareous nannoplankton] Zone NP9b); 2) the Dababiya Quarry Member (=Paleocene/Eocene Thermal Maximum interval) extends from 11.75 to 9.5 m, which is ~1 m less than in the adjacent GSSP outcrop.; 3) the Late Cretaceous (Maastrichtian) depositional environment was ...