Lower Toarcian organic-rich sediments from the Tuscan Succession (Northern Apennines, Italy)

• Autorzy: Perilli N. , Veiga de Oliveira L. , Rodrigues R. , Catanzariti R.
• Konferencja: International Congress on the Jurassic System (7 ; 06-18.09.2006 ; Kraków, Poland]
• Języki publikacji: EN

Abstrakty

EN

This work is aimed to improve lithostratigraphy and biostratigraphy, based on calcareous nannofossils, of the deep-marine Lower Toarcian sediments belonging to Tuscan Nappe (Northern Apennines). The sampled lower part of the Calcari e marne a Posidonia (Posidonia Marls) correlates with the Marne del Monte Serrone of the Umbria-Marche Basin, which is characterized by the presence of the Lower Toarcian black shales. The Calcari e marne a Posidonia consists of grey to greenish hemipelagic to pelagic bivalves-bearing marlstones and limestones with interbedded grey to grey dark, sometimes reddish, clayey marlstones and marly claystones. In some localities, in the lower portion of this formation is recognized a thin to medium thick organic-rich interval of black marlstones and marly claystones. The recovered calcareous nannofossil assemblages allow to assigne the basal portion of the Marne a Posidonia to the Lower Toarcian with the thin organic-rich interval comprised between the appearances of the genera Carinolithus and Discorhabdus.

Słowa kluczowe

EN

Tuscan Nappe; organic-rich sediments; biostratigraphy; calcareous nannofossils; Tuscany; Lower Toarcian; Italy

• Wydawca: Państwowy Instytut Geologiczny - Państwowy Instytut Badawczy
• Czasopismo: Volumina Jurassica
• Rocznik: 2006
• Tom: Vol. 4, no. 1
• Strony: 203--204

Twórcy

autor

Perilli N.

autor

Veiga de Oliveira L.

autor

Rodrigues R.

autor

Catanzariti R.

• Dipartimento Scienze della Terra, Universit�ç degli Studi di Pisa, Via S. Maria, 53, 56100 Pisa, Italy,