期刊
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
卷 36, 期 -, 页码 55-71出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jsames.2011.10.008
关键词
Calcareous nannofossils; Biostratigraphy; Paleoecology; Cretaceous; Pelotas Basin; Brazil
资金
- Laboratorio de Micropaleontologia (Universidade do Vale do Rio dos Sinos - UNISINOS)
Biostratigraphic and paleoecological inferences are made on the distribution of calcareous nannofossils in three wells drilled in the Pelotas Basin, southern Brazil. The succession is composed mainly of siliciclastic rocks sampled by cutting and short core intervals. Eleven biozones were recognized, comprised the late Albian and the Maastrichtian. The frequency and relative abundance of some Cretaceous calcareous nannofossils species suggest a prevalence of warm-water conditions, with cooling events during the late Turonian, late Turonian/early Coniacian, late Coniacian and late Santonian/early Campanian. (C) 2011 Elsevier Ltd. All rights reserved.
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