1,146 research outputs found
Andrea Jori. Il ciclo della vita
No full textSi presenta l'installazione di Andrea Jori "Olam" dedicata al tempo infinit
Arte vitale, vitale arte
No full textSi presenta l'installazione di Andrea Jori "Olam" dedicata al tempo infinit
Andrea Schiavone. Ventuno dipinti in riflettografia
No full textRisultati delle indagini non invasive su ventun dipinti di Andrea Schiavon
The Messinian events within tectono-stratigraphic evolution of the Southern Laga basin (Central Apennines,Italy)
No full textA cyclic two-mode accretion of the external orogenic wedge in the late Miocene-Pleistocene Central Apennine foreland basin system (Italy)
No full textLa sezione stratigrafica del T. Parola (Salsomaggiore, Parma; Appennino Emiliano): confronto con le successioni ipoaline messiniane del margine appenninico padano
No full textMessinian events in a rapidly subsiding and tectonically controlled foreland basin:the Southern Laga Basin (Central Apennines, Italy)
No full textThe Pliocene-Pleistocene Stratigraphic And Tectonic Evolution Of The Central Sector Of The Western Periadriatic Basin Of Italy.
No full textThe Central portion of the Western Periadriatic Basin is a foreland basins systems associated to the Central Apennine Outer Orogenic Wedge that stretches along the Marche and Abruzzi regions of Italy; an area that has been studied since long time and where a plenty of surface and subsurface data are available. The present study is aimed to review and synthetize these data, add new surface and subsurface data in order to define a firm stratigraphic and tectonic framework that is base for the reconstruction of the Pliocene-Pleistocene tectonic-stratigraphic evolution of the Central portion of the Western Periadriatic Basin. The study integrates field mapping, published geological maps, seismic lines, well logs and an updated chronostratigraphic scheme. Six major NNE-SSW thrust stacks and eight unconformity bounded stratigraphic units have been defined; then, a NE-SW oriented zone separates a northern from a southern sector which have differences in structural styles, amount of shortening, basins' widths and thicknesses of stratigraphic units. Despite these differences, the deformation timing, the depositional history and the migration of basins system are common in both sectors and eight tectonic-stratigraphic evolutionary stages have been reconstructed with sequential restoration of two representative cross-sections.
The results highlight that the Pliocene-Pleistocene stratigraphic and tectonic evolution of the Central Western Periadriatic Basin preserves the records of supra-regional and global controls which drive thrust propagation, orogen growth, basins' migration and basins' sedimentary infill. In particular, the stratigraphy preserves global third-order eustatic/climatic changes that have a strict feed-back and concomitance with tectonic pulses. The latter are regulated 1) by cyclic growth of an orogenic wedge undergoing coeval erosion and sedimentation and 2) by eastward retreat of a westward subducting and flexing continental lithosphere
Growth rates and two-mode accretion in the outer orogenic wedge - foreland basin system of Central Apennine (Italy)
No full textThe Central Apennine foreland basin system in the Marche and
Abruzzi regions of Italy preserves the eastern leading edge of the
Apennine orogenic wedge, formed from late Miocene to Pleistocene.
Four thrust stacks make up this external portion Central Apennine
orogenic wedge; they progressively propagated towards the east,
accreted the foredeep basin deposits and simultaneously shifted the depocenters of foredeep and wedge-top basins. An updated chronostratigraphic scheme, integrating recent numerical ages and new GSSP of the Mediterranean area, made it possible to quantify the following rates averaged on time interval of hundreds of thousands years: 1) migration rates of the leading edges of the orogenic wedge (21.47 mm/y); 2) depocenter migration rates of foredeep (9.4 mm/y) and wedge-top (5 mm/y) basins; 3) sedimentation rates in fore deep (2.13 mm/y) and wedge-top (1.1 mm/y) depocenters. The values obtained show that the late Miocene-Pleistocene growth of this orogenic wedge can be envisaged as a cyclic repetition of two accretion modes. A fast-accretion mode, or paroxismal phase, associated with creation of a new thrust front, widespread erosion and widening of the orogenic wedge. Since the late Miocene, three paroxismal phases occurred (around 5.6 M.a., 4.35 M.a and 3.59 M.a.). In the slow-accretion mode, the thrust front did not advance and the orogenic wedge was shortened by out-of-sequence thrusts distributed over the entire wedge; sedimentation rate overcame tectonic deformation and the height of the wedge was increased by the deposition of kilometers-thick marine and continental sediments. This two-mode accretion, common to other orogenic wedges on longer-term periodicity, can be considered typical of orogens and might help in foreseeing the evolution and growth rates of other outer orogenic wedges
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