José Antonio Arz, Ignacio Arenillas, Carolina Náñez,
... MORPHOSTATISTICAL ANALYSIS OF MAASTRICHTIAN POPULATIONS OF GUEMBELITRIA FROM EL KEF, TUNISIA José A. Arz; José A. Arz 3 1Departamento ... MORPHOSTATISTICAL ANALYSIS OF MAASTRICHTIAN POPULATIONS OF GUEMBELITRIA FROM EL KEF, TUNISIA. Journal of Foraminiferal Research 2010;; 40 (2): 148– ... Maastrichtian, based on biometric measures of specimens from El Kef (Tunisia) and morphostatistical analysis. They are mainly recognized based ...
Tópico(s): Geology and Paleoclimatology Research
2010 - Cushman Foundation for Foraminiferal Research | The Journal of Foraminiferal Research
Heather Jones, Thomas Westerhold, Heather Birch, Pincelli M. Hull, Mohamed Hédi Negra, Ursula Röhl, Julio Sepúlveda, Johan Vellekoop, Jessica H. Whiteside, Laia Alegret, Michael J. Henehan, L. Robinson, Joep van Dijk, Timothy J. Bralower,
... locations worldwide. An extensively studied section located near El Kef, northwestern Tunisia, is characterized by the classic iridium-rich K/ ...
Tópico(s): Geological and Geophysical Studies Worldwide
2023 - Geological Society of America | Geological Society of America Bulletin
Dick Kroon, Alexandra J. Nederbragt,
... sediments that represent unstable marine conditions (e.g., El Kef, Tunisia). Presumed gaps in the stratigraphic range of triserial ... Santonian and Campanian sediments of a section near El Kef, Tunisia. An extensive search of the small-sized fractions ( ...
Tópico(s): Marine and fisheries research
1990 - Elsevier BV | Marine Micropaleontology
The Cretaceous/Tertiary boundary section exposed near El Kef, Tunisia is the most complete boundary sequence known to date. It contains nearly 1 m of black and gray boundary clay containing planktic foraminiferal ...
Tópico(s): Geological and Geophysical Studies Worldwide
1988 - Elsevier BV | Palaeogeography Palaeoclimatology Palaeoecology
Ignacio Arenillas, José Antonio Arz, Eustoquio Molina,
... across the Cretaceous-Tertiary (K-T) boundary at El Kef (Tunisia). They revealed a stasis episode in the terminal ...
Tópico(s): Geochemistry and Elemental Analysis
2002 - Taylor & Francis | GFF
Stijn Goolaerts, William J. Kennedy, Christian Dupuis, Étienne Steurbaut,
... K/P) Global Stratotype Section and Point at El Kef, Tunisia. A rich assemblage, consisting of at least 17 ...
Tópico(s): Evolution and Paleontology Studies
2004 - Elsevier BV | Cretaceous Research
Kenneth G. MacLeod, Page C. Quinton, Julio Sepúlveda, Mohamed Hédi Negra,
... and Point for the Cretaceous/Paleogene boundary at El Kef, Tunisia. We report an ~1 per mil decrease in ...
Tópico(s): Geological and Geophysical Studies Worldwide
2018 - American Association for the Advancement of Science | Science
Omrane Ben Abdelkader, Habib Ben Salem, Pierre‐Yves Donzé, Anne-Louise Maamouri, Henriette Méon, Éric Robin, R. Rocchia, L. Froget,
At El Kef (NW Tunisia), the absence of bioturbation and the high sedimentation rate preserve a high resolution record of the Cretaceous- ...
Tópico(s): Geology and Paleoclimatology Research
1997 - Elsevier BV | Geobios
Tanja J. Kouwenhoven, Robert P. Speijer, C.W.M. Van Oosterhout, G.J. van der Zwaan,
... Paleocene outcrops of the El Haria Formation near El Kef, Tunisia is discussed qualitatively and quantitatively. The aim of ...
Tópico(s): Marine Biology and Ecology Research
1997 - Elsevier BV | Marine Micropaleontology
Bijan Beiranvand, Dalila Zaghbib-Turki, Ebrahim Ghasemi‐Nejad,
... similar to the K/Pg type section at El Kef (Tunisia). These sudden mass extinctions indicate a catastrophic pattern ... persist through the Lower Danian and, like in Tunisia (e.g., El Kef section, Ellès section) show an obvious increase in ...
Tópico(s): Hydrocarbon exploration and reservoir analysis
2014 - Elsevier BV | Comptes Rendus Palevol
... in five months event in 2001 in Northwestern Tunisia (El Kef area) are presented in this paper. The total ...
Tópico(s): Geology and Paleoclimatology Research
2014 - OMICS Publishing Group | Journal of Earth Science & Climatic Change
... boundary interval of the El Haria section, near El Kef, northwest Tunisia. No sharp qualitative changes in the dinoflagellate cyst ...
Tópico(s): Geological and Geophysical Studies Worldwide
1988 - Elsevier BV | Review of Palaeobotany and Palynology
José Antonio Arz, Ignacio Arenillas, Ana R. Soria, Laia Alegret, José Manuel Grajales-Nishimura, Carlos L. Liesa, Alfonso Meléndez, Eustoquio Molina, María Carmen Rosales,
... According to the K/P stratotype definition from El Kef (Tunisia), the K/P boundary at La Ceiba must be placed at the base of the clastic (microspherules) unit since it is equivalent to the base of the boundary clay at El Kef. A short hiatus affects the lower part of ...
Tópico(s): Geology and Paleoclimatology Research
2001 - Elsevier BV | Journal of South American Earth Sciences
Ignacio Arenillas, José Antonio Arz, José Manuel Grajales-Nishimura, Gustavo Murillo-Muñetón, Walter Álvarez, Antonio Camargo‐Zanoguera, Eustoquio Molina, Carmen Rosales-Domínguez,
... K/Pg) catastrophic mass extinction horizon in the El Kef (Tunisia) and Caravaca (Spain) sections. The lowermost Danian H. holmdelensis subzone (= Biozone P0) was identified in both sections in a thin dark clay bed just above the CCU, proving that such bed is chronostratigraphically equivalent to the K/Pg boundary clay of the El Kef stratotype. These new micropaleontogical data confirm that the ...
Tópico(s): Geological and Geochemical Analysis
2006 - Elsevier BV | Earth and Planetary Science Letters
Sediments from El Kef, Tunisia, were analysed by RNAA for Au, Ir and Os.All three elements show a 10-20 fold enrichment ...
Tópico(s): Heavy metals in environment
1983 - R. Oldenbourg Verlag | Radiochimica Acta
Gerta Keller, Matthias Lindinger,
Tópico(s): Geological and Geophysical Studies Worldwide
1989 - Elsevier BV | Palaeogeography Palaeoclimatology Palaeoecology
... to the world's most complete record at El Kef, Tunisia. Species extinctions occur over an extended period of ...
Tópico(s): Geological and Geochemical Analysis
1989 - American Geophysical Union | Paleoceanography
... has been examined in continental-shelf sections at El Kef, Tunisia, and Brazos River, Texas. These sections are considered ...
Tópico(s): Geological formations and processes
1989 - Geological Society of America | Geological Society of America Bulletin
An expanded sediment record at El Kef shows that the K/T boundary extinctions of planktic foraminifera extend over an interval from 25 cm below the geochemical boundary (Ir anomaly) to 7 cm above. Species extinctions appear sequential with complex, large, ornate forms disappearing first and smaller, less ornate, forms surviving longer. The 14 species extinctions below the boundary appear unrelated to an impact event. Cretaceous species survivorship is greater than previously assumed. About 10 species ...
Tópico(s): Paleontology and Stratigraphy of Fossils
1988 - Elsevier BV | Marine Micropaleontology
Arthur W. Snoke, Steven Schamel, R. M. Karasek,
... northeast trending anticline in the Tunisian Atlas, near El Kef, Tunisia. The core of the anticline consists of a ...
Tópico(s): Geological and Geochemical Analysis
1988 - Wiley | Tectonics
Éric Robin, D. Boclet, Ph. Bonté, L. Froget, C. Jèhanno, R. Rocchia,
Tópico(s): Geochemistry and Elemental Analysis
1991 - Elsevier BV | Earth and Planetary Science Letters
... itself. These six K/T-complete sections are El Kef (Tunisia), Agost (Spain), Caravaca (Spain), and three sections along ...
Tópico(s): Hydrocarbon exploration and reservoir analysis
1991 - Geological Society of America | Geological Society of America Bulletin
Janneke J. Ottens, Alexandra J. Nederbragt,
... with low equitability in Maastrichtian heterohelicid faunas from El Kef, Tunisia, is interpreted as indicating variable conditions. An increase ...
Tópico(s): Paleontology and Stratigraphy of Fossils
1992 - Elsevier BV | Marine Micropaleontology
... Alabama), and in outcrops at Geulhemmerberg (the Netherlands), El Kef (Tunisia), and Jebel Qurtasiyyat (Jordan).Except for the Jordanian ...
Tópico(s): Geochemistry and Geologic Mapping
2003 - Micropaleontology Press | Micropaleontology
Hartmut Mai, Robert P. Speijer, P. Schulte,
... Alabama), and in outcrops at Geulhemmerberg (the Netherlands), El Kef (Tunisia), and Jebel Qurtasiyyat (Jordan). Except for the Jordanian ...
Tópico(s): Hydrocarbon exploration and reservoir analysis
2003 - Micropaleontology Press | Micropaleontology
... across the Cretaceous-Tertiary (K-T) boundary at El Kef, Tunisia, reveals no extinctions of nannoplankton in the uppermost ...
Tópico(s): Geological formations and processes
1994 - Geological Society of America | Geology
Njoud Gallala, Dalila Zaghbib-Turki,
... eugubina , Parasubbotina pseudobulloides ) is less expanded than at El Kef (Tunisia) [the Global Stratotype Section and Point (GSSP) for ...
Tópico(s): Geological and Geophysical Studies
2010 - De Gruyter | Acta Geologica Polonica
Hubert Vonhof, John W.M. Jagt, Adrian Immenhauser, Jan Smit, Yascha W. van den Berg, Margot Saher, Norbert Keutgen, John J. G. Reijmer,
... matched stratigraphically with records from Hemmoor (northern Germany), El Kef (Tunisia) and ODP site 690 (Maud Rise, Antarctica), leading ...
Tópico(s): Isotope Analysis in Ecology
2011 - Cambridge University Press | Netherlands Journal of Geosciences – Geologie en Mijnbouw
Eustoquio Molina, Laia Alegret, Ignacio Arenillas, José Antonio Arz, Njoud Gallala, Jan Hardenbol, Katharina von Salis, Étienne Steurbaut, Noël Vandenberghe, Dalila Zaghbib-Turki,
Eustoquio Molina, Laia Alegret, Ignacio Arenillas, José A. Arz, Njoud Gallala, Jan Hardenbol, Katharina von Salis, Etienne Steurbaut, Noël Vandenberghe, Dalila Zaghbib-Turki. Episodes 2006;29:263-73. https://doi.org/10.18814/epiiugs/2006/v29i4/004
Tópico(s): Geochemistry and Geologic Mapping
2006 - International Union of Geological Sciences | Episodes
Neil H. Landman, Matthew P. Garb, Remy Rovelli, D. S. Ebel, Lucy E. Edwards,
... at the Global Stratotype Section and Point at El Kef, Tunisia, would, therefore, imply that these assemblages are actually ...
Tópico(s): Geology and Paleoclimatology Research
2012 - Institute of Paleobiology | Acta Palaeontologica Polonica