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Geological Magazine; January 2005; v. 142; no. 1; p. 1-5; DOI: 10.1017/S0016756804009987
© 2005 Cambridge University Press (CUP)
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Article

Discovery of Llandovery (Silurian) graptolites and probable Devonian corals in the Southalpine Metamorphic Basement of the Eastern Alps (Agordo, NE Italy)

IGINIO DIENI*, DANILO GIORDANO{dagger},{dagger}, DAVID K. LOYDELL{ddagger} and FRANCESCO P. SASSI§

* Dipartimento di Geologia, Paleontologia e Geofisica, Università, Via Giotto 1, I 35137 Padova, Italy
{dagger} Istituto Tecnico Industriale Minerario ‘U. Follador’, Via 5 Maggio 16, I 32021 Agordo, Italy
{ddagger} School of Earth and Environmental Sciences, University of Portsmouth, Burnaby Road, Portsmouth PO1 3QL, UK
§ Dipartimento di Mineralogia e Petrologia, Università, Corso Garibaldi 37, I 35137 Padova, Italy

{dagger} Author for correspondence: david.loydell{at}port.ac.uk

We report the discovery of Aeronian (Middle Llandovery) graptolites, and corals of probable Devonian age, in boudins hosted by greenschists, within the Southalpine Metamorphic Basement. These discoveries provide key constraints to the depositional age range of the protoliths. This remarkable occurrence of almost undeformed graptolites and compound corals in boudins within a metamorphic shear zone indicates very marked local strain partitioning.

Key Words: graptolites • corals • Silurian • Devonian • Eastern Alps




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