The most complete and best known Silurian succession of southeastern Sardinia is exposed in the Gerrei tectonic Unit. The Silurian sequence starts with Rhuddanian-lowermost Gorstian black graptolitic shales (Lower Graptolitic Shales), followed by a lower Gorstian-end Pridoli nodular calcareous unit (Ockerkalk). Graptolitic shales (Upper Graptolitic Shales) document the Lower Devonian. An integrated scheme of graptolite and conodont biozonation, compiled from Sardic data, is provided.
The Silurian of the External Nappes (southeastern Sardinia) / Corradini, Carlo; Ferretti, Annalisa. - In: BOLLETTINO DELLA SOCIETÀ PALEONTOLOGICA ITALIANA. - ISSN 0375-7633. - STAMPA. - 3:1(2009), pp. 43-49.
The Silurian of the External Nappes (southeastern Sardinia)
FERRETTI, Annalisa
2009
Abstract
The most complete and best known Silurian succession of southeastern Sardinia is exposed in the Gerrei tectonic Unit. The Silurian sequence starts with Rhuddanian-lowermost Gorstian black graptolitic shales (Lower Graptolitic Shales), followed by a lower Gorstian-end Pridoli nodular calcareous unit (Ockerkalk). Graptolitic shales (Upper Graptolitic Shales) document the Lower Devonian. An integrated scheme of graptolite and conodont biozonation, compiled from Sardic data, is provided.
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2009R, c-Silurian External Nappes - BSPI Suppl. 3(1).pdf
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