Abstract - New dating based on calcareous nannofossils recovered from the Calcari di Groppo del Vescovo Fm. is presented in this paper. This unit and the Argille e calcari di Canetolo Fm. belong to the Canetolo Unit (Subligurian Units) which is interposed between the Ligurian and Tuscan Units. Due to tectonics, the lateral extension and thickness of the outcrops of the Calcari di Groppo del Vescovo Fm. are limited and the contact with the Argille e calcari di Canetolo Fm. is usually tectonized. The aim of this paper is to refine the dating of the Calcari di Groppo del Vescovo Fm. in order to clarify the relationship with the Argille e calcari di Canetolo Fm. in the investigated areas of the Ligurian-Emilian-Tuscan Apen- nine. Based on semiquantitative analysis of the assemblages, the Calcari di Groppo del Vescovo Fm. ranges in age from Early Eocene (NP11) to Middle Eocene (NP14). Our data point out for the first time the existence of latero-vertical rela- tionships between this unit and the Argille e calcari di Can- etolo Fm. which dates from Late Paleocene (NP5) to Early Eocene (NP11) and Middle Eocene (NP14 to NP15) in age.
The calcari di Groppo del Vescovo formation (Subligurian Units; Northern Appennines, Italy): new dating basd on calcareous nannofossils
PERILLI, NICOLA;
2009-01-01
Abstract
Abstract - New dating based on calcareous nannofossils recovered from the Calcari di Groppo del Vescovo Fm. is presented in this paper. This unit and the Argille e calcari di Canetolo Fm. belong to the Canetolo Unit (Subligurian Units) which is interposed between the Ligurian and Tuscan Units. Due to tectonics, the lateral extension and thickness of the outcrops of the Calcari di Groppo del Vescovo Fm. are limited and the contact with the Argille e calcari di Canetolo Fm. is usually tectonized. The aim of this paper is to refine the dating of the Calcari di Groppo del Vescovo Fm. in order to clarify the relationship with the Argille e calcari di Canetolo Fm. in the investigated areas of the Ligurian-Emilian-Tuscan Apen- nine. Based on semiquantitative analysis of the assemblages, the Calcari di Groppo del Vescovo Fm. ranges in age from Early Eocene (NP11) to Middle Eocene (NP14). Our data point out for the first time the existence of latero-vertical rela- tionships between this unit and the Argille e calcari di Can- etolo Fm. which dates from Late Paleocene (NP5) to Early Eocene (NP11) and Middle Eocene (NP14 to NP15) in age.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
