Fossil communities in the Aguión formation (Lower Devonian) of the Arnao Platform (Asturias, NW Spain)

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• 作者：Miguel Arbizu ; Isabel Mé ; ndez-Bedia ; Francisco Soto
• 刊名：Geobios
• 出版年：1995
• 出版时间：1995
• 年：1995
• 卷：28
• 期：5
• 页码：567-571
• 全文大小：3180 K

文摘

This paper analyzes the evolution of faunal communities from the lower part of the Aguión Formation (LowerDevonian, Upper Emsian) of the Arnao Platform (north side of the Cantabrian Zone, NW Spain). Three informal units of beds with different lithological and faunal characteristics are described. In these units several communities developed in different environmental conditions. In the basal calcareous unit communities were related to a patch-reef biostrome developed on bioclastic bars; in the second marly-shaly unit the communities characterized sheltered environmental conditions; the third unit of green and red marls, shows communities that were clearly related to platform environments with a high rate of terrigenous supply.