Basin plain deposits of the Marnoso-Arenacea Formation, Italy

Amy, L.A. and Talling, P.J. (2008) Basin plain deposits of the Marnoso-Arenacea Formation, Italy. In, Nilsen, Tor H., Shew, Roger D., Steffens, Gary S. and Studlick, Joseph R.J. (eds.) Atlas of Deep-Water Outcrops. (AAPG Studies in Geology, 56) Boulder CO, USA. American Association of Petroleum Geologists.

Abstract

The Marnoso Arenacea turbidite system outcrops across a large area (125 × 35 km [78 × 22 mi]) of the northern Apennines in Italy (1). It records sedimentation within a Miocene foreland basin and has been an area of turbidite research for more than fifty years. Correlations of individual flow deposits (beds) within the Serravallian, ponded basin-plain sequence are some of the most extensive in any ancient turbidite system. Long-distance (>100 km [>62 mi]) bed correlation was first established by Ricci Lucchi and Valmori (1980) for a 200-m (656-ft)-thick stratigraphie interval, between 18 measured sections. Correlation is aided in this system by the presence of carbonate-rich marker beds which have a distinct provenance and composition. This contribution presents an enhanced correlation framework for a 30-m (98-ft)-thick sub-interval, positioned above the most prominent marker bed (the Contessa). This new correlation framework is based on more than 100 measured sections (Figures 1,2). The additional sections were identified using new 1:10,000 geological maps (produced by the Emilia-Romagna, Marche, Toscana, and Umbria Geological Surveys) that show the position of the Contessa marker bed.

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