GNGTS 2013 - Atti del 32° Convegno Nazionale

On the left side of the Meduna river near Ponte Maraldi, the Q7 unit (Sequals syntem, Travesio lobe, upper Pleistocene according to Zanferrari et al. , 2008) presents a throw of about 25 m on the Maniago thrust (Fig. 3). On these bases an uplift rate of about 1.1. mm/y can be evaluated. Moreover the terrace surface on the Q7 unit near Maraldi presents a fault scarp of about 7-8 m. Instead on the hanginwall of the Maniago fault the thickness of the Q7 unit is very thin (close to the “strath terrace”definition), on the contrary in the footwall of the thrust the alluvial deposits are more than 20 meters in thickness (“fill terrace”). References Avigliano R., Calderoni G., Monegato G. and Mozzi P.; 2002: The late Pleistocene-Holocene evolution of the Cellina and Meduna alluvial fans (Friuli NE Italy) . Memorie Società Geologica Italiana, 57 , 133-139. Bull W.B.; 1991: Geomorphic Response to Climatic Change . Oxford University Press, New York. Burrato P., Poli M.E., Vannoli P., Zanferrari A. and Basili R., Galadini F.; 2008: Sources of Mw 5+ earthquakes in northeastern Italy and western Slovenia: An updated view based on geological and seismological evidence. Tectonophysics, 453 , 157-176. Caputo R., Poli M.E. and Zanferrari A.; 2010: Neogene-Quaternary tectonic stratigraphy of the eastern Southern Alps, NE Italy . Journal of Structural Geology 32 , 1009-1027. DISS Working Group; 2010: Database of Individual Seismogenic Sources (DISS), Version 3.1.1: A compilation of potential sources for earthquakes larger than M 5.5 in Italy and surrounding areas. http://diss.rm.ingv.it/diss/ , © INGV 2010 - Istituto Nazionale di Geofisica e Vulcanologia - All rights reserved; DOI:10.6092 /INGV.IT- DISS3.1.1. Feruglio E.; 1929: Nuove ricerche sul Quaternario del Friuli . Giornale di Geologia, 4 , 1-36. Galadini F., Poli M.E. and Zanferrari A.; 2005: Seismogenic sources potentially responsible for earthquakes with M≥6 in the eastern Southern Alps (Thiene-Udine sector, NE Italy). Geophysical Journal International 161 , 739-762. Lisiecki L E. and Raymo, M. E; 2005: A Pliocene-Pleistocene stack of 57 globally distributed benthic d18O records . Paleoceanography, 20 , PA1003, doi:10.1029/2004PA001071 Locati M., Camassi R., Stucchi M. (eds.); 2011: DBMI11, the 2011 version of the Italian Macroseismic Database. Milano, Bologna, http://emidius.mi.ingv.it/DBMI11. Massari F., Grandesso P., Stefani C. and Zanferrari A.; 1986: The Oligo-Miocene Molasse of the Veneto-Friuli region, Southern Alps. Giornale di Geologia, 48 , 235-255. Monegato G. and Stefani C.; 2011: Preservation of a long-lived fluvial system in a mountain chain: the Tagliamento Valley (Southeastern Italian Alps). In: Davidson S.K., Leleu S., North C.P. (eds.): From river to rock record: The preservation of fluvial sediments and their subsequent interpretation. Society for Sedimentary Geology, Special Publication, 97 : 359-374. Monegato G., Lowick S.E., Ravazzi C., Banino R., Donegana M. and Preusser F.; 2010: Middle to Late Pleistocene chronology and palaeoenvironmental evolution of the south-eastern Alpine Foreland: the Valeriano Creek succession (NE Italy). Journal of Quaternary Science, 25 , 617-632. Poli M.E., Zanferrari A. and Monegato G.; 2009: Geometria, cinematica e attività pliocenico-quaternaria del sistema di sovrascorrimenti Arba-Ragogna (Alpi Meridionali orientali, Italia NE). Rendiconti online Società Geologica Italiana, 5 , 172-175. Serpelloni E., Anzidei M., Baldi P., Casula G. and Galvani A.; 2005: Crustal velocity and strain-rate fields in Italy and surrounding regions: new results from the analysis of permanent and non-permanent GPS networks . Geophys. J. Int. 161 , 861-880. Venturini C.; 1985: I depositi quaternari di Ponte Racli (PN, Prealpi Friulane). Gortania, Atti Museo Friulano di Storia Naturale, Udine, 7 , 37-58 Wegmann K.W. and Pazzaglia F.J.; 2009: Late Quaternary fluvial terraces of the Romagna and Marche Apennines, Italy: Climatic, lithologic, and tectonic controls on terrace genesis in an active orogen. Quaternary Science Reviews, 28 , 137-165. Zanferrari A., Avigliano R., Grandesso P., Monegato G., Paiero G., Poli M.E. and Stefani C.; 2008: Note illustrative della Carta Geologica d’Italia alla scala 1:50.000: Foglio 065 “Maniago”. APAT-Servizio Geologico d’Italia – Regione Autonoma Friuli Venezia Giulia. Zanferrari A., Masetti D., Monegato G. and Poli M.E.; 2013: Note illustrative della Carta Geologica d’Italia alla scala 1:50.000; Foglio 049 “Gemona del Friuli”. ISPRA-Servizio Geologico d’Italia - Regione Autonoma Friuli-Venezia Giulia, 262 pp. http://www.isprambiente.gov.it/Media/carg/friuli.html 197 GNGTS 2013 S essione 1.2