Raised Holocene paleo-shorelines along the Capo Vaticano coast (western Calabria,Italy): Evidence of co-seismic and steady-state deformation |
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| Institution: | 1. School of Science and Environment, Cockcroft Building, University of Brighton, BN2 4GJ, UK;2. Department of Archaeology, University of Durham, South Road, Durham DH1 3LE, UK;3. Archive and Archaeology Service, Worcestershire County Council, The Hive, Sawmill Walk, The Butts, Worcester WR1 3PB, UK;4. Palaeoenvironmental Research Laboratory, Geography and Environment, University of Southampton, Highfield Campus, Southampton SO17 1BJ, UK;1. Dipartimento di Scienze–Sezione Geologia, Università Roma Tre, Largo San Leonardo Murialdo 1, Roma, Italia;2. Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Roma 1, Via Vigna Murata 509, Roma, Italia;3. Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Bologna, Via Donato Creti 12, Bologna, Italia, Italy;4. Parco Regionale dell''Appia Antica, via Appia Antica 42, Roma, Italy;5. Geological Survey of Japan, AIST Site 7, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8567, Japan;1. Geomagellan, Montecompatri, Rome, Italy;2. Consiglio Nazionale delle Ricerche, IGAG, Rome, Italy;3. Dipartimento di Scienze, Università Roma Tre, Rome, Italy;4. Istituto Nazionale di Geofisica e Vulcanologia, Rome, Italy |
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| Abstract: | Detailed mapping of geomorphological and biological sea-level markers around the Capo Vaticano promontory (western Calabria, Italy), has documented the occurrence of four Holocene paleo-shorelines raised at different altitudes. The uppermost shoreline (PS1) is represented by a deeply eroded fossiliferous beach deposit, reaching an elevation of ～2.2 m above the present sea-level, and by a notch whose roof is at ～2.3 m. The subjacent shoreline PS2 is found at an elevation of ～1.8 m and is represented by a Dendropoma rim, a barnacle band and by a wave-cut platform. Shoreline PS3 includes remnants of vermetid concretions, a barnacle band, a notch and a marine deposit, and reaches an elevation of ～1.4 m. The lowermost paleo-shoreline (PS4) includes a wave-cut platform and a notch and reaches an elevation of ～0.8 m. Radiocarbon dating of material from individual paleo-shorelines points to an average uplift rate of 1.2–1.4 mm/yr in the last ～6 ka at Capo Vaticano. Our data suggest that Holocene uplift was asymmetric, with a greater magnitude in the south-west sector of the promontory, in a manner similar to the long-term deformation attested by Pleistocene terraces. The larger uplift in the south-western sector is possibly related to the additional contribution, onto a large-wavelength regional signal, of co-seismic deformation events, which are not registered to the north-east. We have recognized four co-seismic uplift events at 5.7–5.4 ka, 3.9–3.5 ka, ～1.9 ka and <1.8 ka ago, superposed on a regional uplift that in the area, is occurring at a rate of ～1 mm/yr. Our findings places new constrains on the recent activity of border faults south of the peninsula and on the location of the seismogenic source the 1905 destructive earthquake. |
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| Keywords: | Calabrian Arc Holocene Paleo-shoreline Uplift |
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