| Summary: | 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. Fil: Guerra, Rodrigo Do Monte. Universidade do Vale do Rio dos Sinos; Brasil Fil: Concheyro, Graciela. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos; Argentina. Ministerio de Relaciones Exteriores, Comercio Interno y Culto. Dirección Nacional del Antártico. Instituto Antártico Argentino; Argentina Fil: Lees, Jackie. University College London; Estados Unidos Fil: Fauth, Gerson. Universidade do Vale do Rio dos Sinos; Brasil Fil: Carvalho, Marcelo de Araujo. Universidade Federal Do Rio de Janeiro. Museu Nacional; Brasil Fil: Ramos, Renato Rodriguez Cabral. Universidade Federal Do Rio de Janeiro. Museu Nacional; Brasil
|
|---|