The Y-3 tephra: A Last Glacial stratigraphic marker for the central Mediterranean basin |
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| Authors: | G Zanchetta R Sulpizio B Giaccio G Siani M Paterne S Wulf M D'Orazio |
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| Institution: | 1. Dipartimento di Scienze della Terra, University of Pisa, via S. Maria 53, I-56126 Pisa, Italy;2. IGG-CNR Via Moruzzi, 1, 56100 Pisa, Italy;3. CIRISIVU, c/o Dipartimento Geomineralogico, University of Bari, via Orbona 4, I-70125, Bari, Italy;4. Istituto di Geologia Ambientale e Geoingegneria, CNR, via Bolognola 7, 00138, Roma, Italy;5. FRE 2566 Orsayterre Universitè Paris XI 91405 Orsay, France;6. Laboratoire des Sciences du Climat et de l''Envirnment, CNRS-CEA 91198 Gif sur Yvette, France;g Institute for Geophysics, Jackson School of Geosciences, The University of Texas, J.J. Pickle Research Campus, Bldg. 196, 10100 Burnet Rd., Austin, TX 78758-4445, USA |
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| Abstract: | The paper reviews the existing data on the Y-3 tephra layer, first recognised in the Ionian Sea (Mediterranean basin). The collection and collation of old and new data on distal tephra occurrences in terrestrial, marine and lacustrine successions indicate that the Y-3 layer is dispersed over a wide area of the central Mediterranean basin. The peculiar homogeneous chemical composition of this layer makes its recognition rather straightforward and permits it being distinguished from other stratigraphically adjacent tephras. The best age estimate for the Y-3 layer of ca 30–31 cal ka BP, its peculiar stratigraphic position close to the Marine Isotope Stage 3/2 transition or Heinrich Event 3 onset, as well as its wide dispersion makes this layer an important marker to link and date late Pleistocene terrestrial and marine archives of the central Mediterranean basin. |
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| Keywords: | tephrostratigraphy tephrochronology Y-3 Central Mediterranean Campanian volcanoes |
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