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Integrated biomagnetostratigraphy of the Alano section (NE Italy): A proposal for defining the middle-late Eocene boundary

Integrated biomagnetostratigraphy of the Alano section (NE Italy): A proposal for defining the middle-late Eocene boundary
Integrated biomagnetostratigraphy of the Alano section (NE Italy): A proposal for defining the middle-late Eocene boundary
The Alano section has been presented at the International Subcommission on Paleogene Stratigraphy (ISPS) as a potential candidate for defi ning the global boundary stratotype section and point (GSSP) of the late Eocene Priabonian Stage. The section is located in the Venetian Southern Alps of the Veneto region (NE Italy), which is the type area of the Priabonian, being exposed along the banks of the Calcino torrent, near the village of Alano di Piave. It consists of ~120–130 m of bathyal gray marls interrupted in the lower part by an 8-m-thick package of laminated dark to black marlstones. Intercalated in the section, there are eight prominent marker beds, six of which are crystal tuff layers, whereas the other two are bioclastic rudites. These distinctive layers are useful for regional correlation and for an easy recognition of the various intervals of the section. The section is easily accessible, crops out continuously, is unaffected by any structural deformation, is rich in calcareous plankton, and contains an expanded record of the critical interval for defi ning the GSSP of the Priabonian. In order to further check the stratigraphic completeness of the section and constrain in time the critical interval for defi ning the Priabonian Stage, we performed a high-resolution study of integrated calcareous plankton biostratigraphy and a detailed magnetostratigraphic analysis. Here, we present the results of these studies to open a discussion on the criteria for driving the “golden spike” that should define the middle Eocene–late Eocene boundary.
0016-7606
841-872
Agnini, Claudia
accab295-8795-4af8-943a-22d2d2afda89
Fornaciari, Eliana
a51ba751-92df-4550-a210-c0911b435595
Giusberti, Luca
2642930b-7c5b-4cf4-aadf-6a71fda4f02b
Grandesso, Paolo
d067c99c-3a43-49c6-a290-79843dc46b61
Lanci, Luca
0fb94725-9943-4fa9-83b8-c4bee7e7f985
Luciani, Valeria
d37642c8-f55b-4a0d-ac77-85d155b63066
Muttoni, Giovanni
64a1fa07-4f1f-4138-acee-3eeec47a7b10
Pälike, Heiko
b9bf7798-ad8c-479b-8487-dd9a30a61fa5
Rio, Domenico
14427630-5fab-4d9c-bbdb-3c856c9a984d
Spofforth, D.J.A.
b989dfad-64d8-482a-8e49-8a0bbc1c7ad7
Stefani, Cristina
2a8f7e31-8aa1-4b8f-a6af-d430dcfb01fb
Agnini, Claudia
accab295-8795-4af8-943a-22d2d2afda89
Fornaciari, Eliana
a51ba751-92df-4550-a210-c0911b435595
Giusberti, Luca
2642930b-7c5b-4cf4-aadf-6a71fda4f02b
Grandesso, Paolo
d067c99c-3a43-49c6-a290-79843dc46b61
Lanci, Luca
0fb94725-9943-4fa9-83b8-c4bee7e7f985
Luciani, Valeria
d37642c8-f55b-4a0d-ac77-85d155b63066
Muttoni, Giovanni
64a1fa07-4f1f-4138-acee-3eeec47a7b10
Pälike, Heiko
b9bf7798-ad8c-479b-8487-dd9a30a61fa5
Rio, Domenico
14427630-5fab-4d9c-bbdb-3c856c9a984d
Spofforth, D.J.A.
b989dfad-64d8-482a-8e49-8a0bbc1c7ad7
Stefani, Cristina
2a8f7e31-8aa1-4b8f-a6af-d430dcfb01fb

Agnini, Claudia, Fornaciari, Eliana, Giusberti, Luca, Grandesso, Paolo, Lanci, Luca, Luciani, Valeria, Muttoni, Giovanni, Pälike, Heiko, Rio, Domenico, Spofforth, D.J.A. and Stefani, Cristina (2011) Integrated biomagnetostratigraphy of the Alano section (NE Italy): A proposal for defining the middle-late Eocene boundary. Geological Society of America Bulletin, 123 (5-6), 841-872. (doi:10.1130/B30158.1).

Record type: Article

Abstract

The Alano section has been presented at the International Subcommission on Paleogene Stratigraphy (ISPS) as a potential candidate for defi ning the global boundary stratotype section and point (GSSP) of the late Eocene Priabonian Stage. The section is located in the Venetian Southern Alps of the Veneto region (NE Italy), which is the type area of the Priabonian, being exposed along the banks of the Calcino torrent, near the village of Alano di Piave. It consists of ~120–130 m of bathyal gray marls interrupted in the lower part by an 8-m-thick package of laminated dark to black marlstones. Intercalated in the section, there are eight prominent marker beds, six of which are crystal tuff layers, whereas the other two are bioclastic rudites. These distinctive layers are useful for regional correlation and for an easy recognition of the various intervals of the section. The section is easily accessible, crops out continuously, is unaffected by any structural deformation, is rich in calcareous plankton, and contains an expanded record of the critical interval for defi ning the GSSP of the Priabonian. In order to further check the stratigraphic completeness of the section and constrain in time the critical interval for defi ning the Priabonian Stage, we performed a high-resolution study of integrated calcareous plankton biostratigraphy and a detailed magnetostratigraphic analysis. Here, we present the results of these studies to open a discussion on the criteria for driving the “golden spike” that should define the middle Eocene–late Eocene boundary.

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Published date: 21 January 2011

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Local EPrints ID: 172815
URI: https://eprints.soton.ac.uk/id/eprint/172815
ISSN: 0016-7606
PURE UUID: 78bcef9d-34dd-4c43-86a2-483b5c7d069b

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Date deposited: 31 Jan 2011 09:43
Last modified: 18 Jul 2017 12:13

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Contributors

Author: Claudia Agnini
Author: Eliana Fornaciari
Author: Luca Giusberti
Author: Paolo Grandesso
Author: Luca Lanci
Author: Valeria Luciani
Author: Giovanni Muttoni
Author: Heiko Pälike
Author: Domenico Rio
Author: D.J.A. Spofforth
Author: Cristina Stefani

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