Original paper
Biostratigraphy of calcareous nannofossils across the K/T boundary in Egypt
Faris, Mahmoud
Neues Jahrbuch für Geologie und Paläontologie - Monatshefte Jg. 1997 Heft 8 (1997), p. 447 - 464
49 references
published: Aug 5, 1997
DOI: 10.1127/njgpm/1997/1997/447
ArtNo. ESP157199708000, Price: 19.00 €
Abstract
A detailed biostratigraphical study of the K/T boundary interval in 13 sections in Egypt has been carried out on the basis of calcareous nannofossils assemblages. The occurrence of Micula prinsii is used as an important species to verify the completeness of the terminal Maastrichtian sequences in some of the studied sections. The geographic distribution of Micula murus, M. prinsii and Nephrolithus frequens in Egypt is discussed. The first two species (tropical to temperate forms) are relatively widely distributed in the late and latest Maastrichtian sediments of Egypt, respectively. The occurrence of Nephrolithus frequens (temperate to boreal species) in the Egyptian Late Maastrichtian rocks is rather limited. In the El Ain section (NE Sinai) and St. Paul (South Galala), the K/T boundary is well defined, where the Micula prinsii of the latest Maastrichtian and the Markalius inversus Zone (NP 1) of the earliest Paleocene are recorded with a possible minor hiatus at the base of the Paleocene. In some of the studied sections, however, some nannofossil zones are missing leading to the recognition of stratigraphic gaps.
Kurzfassung
Eine detaillierte Untersuchung der Verbreitung des kalkigen Nannoplanktons im Bereich der Kreide/Tertiär-Grenze hat gezeigt, daß diese nur an sehr wenigen Lokalitäten ohne Schichtlücke ausgebildet ist.
Keywords
biostratigraphy • nannofossils • calcareous