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| Bastos,Alex C.; Vilela,Claudia G.; Quaresma,Valéria S.; Almeida,Fabiana K.. |
| Vitoria Bay is a 20 km long estuary, morphologically narrow, with a microtidal regime and, as other modern estuaries, was formed during the last post-glacial transgression. The estuarine bed morphology is characterised by a main natural channel limited by tidal flats with developed mangroves. Original radiocarbon dates were obtained for the site. Five radiocarbon ages ranging from 1,010 to 7,240 years BP were obtained from two sedimentary cores, which represent a 5 m thick stratigraphic sequence. The results indicate that, until about 4,000 cal. yrs BP, environmental conditions in Vitoria Bay were still of an open bay, with a free and wide connection with marine waters. During the last 4,000 yrs, the bay has experienced a major regression phase, by... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: High-resolution seismic; Holocene estuarine evolution; Radiocarbon dating; Vitoria Bay; Biofacies. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652010000300022 |
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| Kietzmann,Diego Alejandro; Palma,Ricardo Manuel. |
| Se realizaron estudios tafonómicos y paleoecológicos de las asociaciones fósiles en las sucesiones transgresivas y de mar alto de la Formación Vaca Muerta (Tithoniano inferior - Valanginiano superior) de las secciones del arroyo Loncoche, arroyo Rahue y Cuesta del Chihuido, provincia de Mendoza. Sobre la base de la integración de estudios tafonómicos y biofaciales, y litofaciales y microfaciales previos, se determinaron distintos subambientes de la rampa carbonática, que incluyen rampa media, rampa externa y cuenca. En la zona de rampa media se reconocieron las siguientes tafofacies: dos tipos de autopa-rabiostromas, así como concentraciones de bivalvos, gastrópodos y serpúlidos; mientras que las biofacies incluyen autobiostromas ricos en grifeidos y... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Formación Vaca Muerta; Tafofacies; Biofacies; Rampa externa; Jurásico-Cretácico. |
| Ano: 2009 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0002-70142009000200010 |
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