Calcareous nannofossils from the Santa Marta Formation (Upper Cretaceous), northern James Ross Island,Antarctic Peninsula |
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| Institution: | 1. ITT Fossil, Instituto Tecnológico de Micropaleontologia, Universidade do Vale do Rio dos Sinos (UNISINOS), Av. UNISINOS, 950, B. Cristo Rei/CEP: 93.022-000, São Leopoldo, RS, Brazil;2. Instituto Antártico Argentino (IAA), Buenos Aires, Argentina;3. IDEAN-CONICET, Departamento de Ciências Geológicas, Universidad de Buenos Aires, Pabellón II, Ciudad Universitaria, 1428, Buenos Aires, Argentina;4. Department of Earth Sciences, University College London, Gower Street, London, WC1E 6BT, UK;5. Museu Nacional – Universidade Federal do Rio de Janeiro, Brazil;1. Institut Català de Paleontologia Miquel Crusafont, C/ Escola Industrial 23, 08201 Sabadell, Catalonia, Spain;2. Departament d’Estratigrafia, Paleontologia i Geociències Marines, Universitat de Barcelona-UB, c/Martí i Franquès s/n, 08028 Barcelona, Catalonia, Spain;3. Instituto de Geociencias (CSIC, UCM), Facultad de Geología, C/ Jose Antonio Novais 12, 28040 Madrid, Spain;4. Departament de Geologia, Universitat Autònoma de Barcelona, Avinguda de l''Eix central s/n, 08193 Bellaterra, Catalonia, Spain;5. CNRS-UMR5276 LGL-TPE, Université Lyon 1 (Claude Bernard), OSU Lyon, 69622 Villeurbanne, France;1. Lerchenauerstr. 167, D-80935 München, Germany;2. Earth Observatory of Singapore, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore |
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| Abstract: | This study reports on the most stratigraphically extensive nannofloras yet recovered from the Lachman Crags Member of the Santa Marta Formation, James Ross Island, Antarctic Peninsula. The productive samples are dated as early Campanian. These ages are in accord with those provided by ammonites, foraminifera, ostracods and radiolarians from the same locality. The consistent and relatively abundant presence of Gephyrobiscutum diabolum throughout the productive part of the section, a species that has previously only been documented from the Falkland Plateau, extends its geographic distribution to higher latitudes, at least to the Antarctic Peninsula area. |
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| Keywords: | Calcareous nannofossils James Ross Island Antarctic Peninsula Cretaceous Early Campanian |
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