113 results on '"Baradello, L."'
Search Results
102. Paleoseismological evidence for historical ruptures along the Meduno Thrust (eastern Southern Alps, NE Italy)
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Emanuela Falcucci, Giovanni Monegato, Igor Dal Bo, Luca Baradello, A. Affatato, Emanuele Forte, Adriano Zanferrari, Stefano Gori, Enrico Del Pin, Maria Eliana Poli, Gualtiero Böhm, Andrea Marchesini, S. Grimaz, Poli, M. E., Falcucci, E., Gori, S., Monegato, G., Zanferrari, A., Affatato, A., Baradello, L., Bohm, G., Bo, I. D., Del Pin, E., Forte, E., Grimaz, S., and Marchesini, A.
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geography ,geography.geographical_feature_category ,Paleoseismology ,active fault ,morphogenic earthquake ,applied geophysics ,eastern Southern Alps ,NE Italy ,Active fault ,Fault (geology) ,Fault scarp ,Tectonics ,Geophysics ,Terrace (geology) ,Eastern Southern Alps ,Applied geophysics ,Morphogenic earthquake ,ddc:550 ,Seismic refraction ,Electrical resistivity tomography ,Eastern Southern Alp ,Applied geophysic ,Geology ,Seismology ,Earth-Surface Processes - Abstract
We carried out new geological, morphotectonic, geophysical and paleoseismological investigations on the Meduno Thrust that belongs to the Pliocene-Quaternary front of the eastern Southern Alps in Friuli (NE Italy). The study area is located in the Carnic Prealps, where a series of alluvial terraces, linked to both climatic and tectonic pulses characterises the lower reach of the Meduna Valley. In correspondence of the oblique ramp of the Meduno Thrust, the Late Pleistocene Rivalunga terrace shows a set of scarps perpendicular to the Meduno valley, often modified by human activity. In order to reconstruct the tectonic setting of the area and identify the location for digging paleoseismological trenches, integrated geophysical investigations including electrical resistivity tomography, seismic refraction and reflection, ground penetrating radar and surface wave analyses (HVSR, ReMi and MASW), were carried out across the scarps of the Rivalunga terrace. Geophysical surveys pinpointed that in correspondence of the oblique ramp, stress is accommodated by a transpressive thrust system involving all the seismo-stratigraphic horizons apart from the ploughed soil. Trenching illustrated the Meduno Thrust movements during Late Pleistocene-Holocene. Trenches exhibited both shear planes and extrados fracturing, showing deformed alluvial and colluvial units. 14C datings of the colluvial units show that the most recent fault movements occurred after 1360 CE and 1670 CE. The age of the deformed stratigraphic units compared with the earthquakes listed in current catalogues, suggests that the 1776 earthquake (Mw 5.8, Io = 8–9 MCS) could represent the last seismic event linked to the Meduno thrust activity. This study provided new quantitative constraints improving seismic hazard assessment for Carnic prealpine area.
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- 2021
103. Innovative technologies for the sustainable management of water resources: the WARBO (WAter Re-BOrn) project.
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YÀBar, D. NIETO, Accaino, F., Affatato, A., Barbagallo, A., Baradello, L., Coren, F., Paganini, P., Vaccaro, C., Zeid, N. Abu, Leis, M., Santarato, G., Farina, S., and Gruppioni, M.
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WATER supply , *ARTIFICIAL groundwater recharge , *TECHNOLOGICAL innovations , *HYDROGEOLOGICAL modeling , *REMOTE sensing , *PARTIAL differential equations - Abstract
The WARBO project will facilitate the regulation of water artificial recharge (AR) and determine how to respond to the need to safeguard, protect and enhance water and land ecosystems. The project will focus on sites with AR problems hosting ecosystems of community interest where urgent measures are needed to fight against water scarcity and to develop protocols able to specify how to manage recharge activities. The protocols concerning direct (hydrogeological, geochemical and isotopic) and indirect (geophysical and remote sensing) surveys will be finalized and applied to two main macro-areas. The first is the Friuli plain (NE Italy), with the aim of identifying the short- and long-term effects of the recharge of highly permeable aquifers in order to mitigate the lowering of piezometric levels and the degradation of the forested areas impacted by a gradual shift of the springs towards lower altitudes and to estimate the water savings that could be achieved through the reclamation and use of grey water in the ZIPR test site (San Vito al Tagliamento, Pordenone). The second is the southern Po Plain in the Copparo area (Ferrara, northern Italy) in order to assess the effectiveness and the issues connected with recharge activities in salinised aquifer inland characterized by medium-low permeability and to estimate the effectiveness of phytopurification systems and the improvement of biodiversity. The aims of the WARBO project are: the integration and updating of the CAMI-LIFE database to improve existing knowledge and to better evaluate the hydrogeological and geochemical evolution of aquifers; the updating of the conceptual model and identification of test areas; the application of innovative hydrological 3D models implementing state-ofthe- art numerical procedures to solve partial differential equations (as finite elements, mixed finite elements, finite volumes). [ABSTRACT FROM AUTHOR]
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- 2012
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104. Bathymetric map of Lago Fagnano (Tierra del Fuego Island).
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Zanolla, C., Lodolo, E., Lippai, H., Tassone, A., Menichetti, M., Baradello, L., Grossi, M., and Hormaechea, H. L.
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BATHYMETRIC maps - Abstract
We present a general bathymetric map of Lago Fagnano, the largest ice-free lake of the Southern Hemisphere, located in the central part of the Tierra del Fuego Island. The map has been obtained compiling all the available bathymetric soundings and depth-converted high-resolution seismic profiles, collected in the course of several geophysical campaigns. The lake occupies a 110-km long, E-W trending tectonic depression within the southernmost tip of the Andean Cordillera, where the South America-Scotia plate boundary traverses the Tierra del Fuego Island. The map allows us to identify the main morpho-bathymetric features of Lago Fagnano. The lake floor is divided into two principal sectors of different water depths, separated by a main shoal located in the central part of the lake. Maximum water depth (206 m) is found in the eastern part, whereas water depths in the western half do not exceed 165 m. In this paper, we describe the geometry and the general morphological characteristics of the basin, which was generated by a combination of distinct tectonic processes, and later superposed by Late Quaternary glacial and glacio-lacustrine dynamic events. [ABSTRACT FROM AUTHOR]
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- 2011
105. Understanding the hydrogeology of the Venice Lagoon subsurface with airborne electromagnetics
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Andrea Viezzoli, Massimo Zecchin, Pietro Teatini, Luigi Tosi, Luca Baradello, Sonia Silvestri, Teatini P., Tosi L., Viezzoli A., Baradello L., Zecchin M., and Silvestri S.
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Airborne electromagnetics ,Fresh-saltwater mixing ,Groundwater-surface water interaction ,Hydrogeology of transitional environments ,Venice Lagoon ,Water Science and Technology ,Hydrology ,geography ,Hydrogeology ,geography.geographical_feature_category ,Electromagnetics ,Aquifer ,Wetland ,Hydrogeology of transitional environment ,Salt marsh ,SUBMARINE GROUNDWATER DISCHARGE ,CONSTRAINED INVERSION ,SEAWATER INTRUSION ,SEISMIC-DATA ,TIME-DOMAIN ,TEM DATA ,RESOLUTION ,INTERFACE ,RESISTIVITY ,Airborne electromagnetic ,Groundwater discharge ,Drainage ,Geomorphology ,Geology ,Groundwater - Abstract
The occurrence of alternating dry/wet conditions in transitional environments, such as wetlands, deltas, and lagoons, usually challenges the use of traditional direct and geophysical surveys for comprehensive hydrogeologic investigations. Moreover, significant mixing between continental fresh groundwater and marine salty surface waters generally takes place in these flat coastal areas. Airborne electromagnetics (AEM) is a promising tool in this respect, as it provides, in a fast and cost effective manner, large-scale distribution of bulk electrical conductivities that can be used profitably to develop hydrogeologic models. The results of a SkyTEM AEM survey in the Venice Lagoon, Italy, show the capability of this technique to significantly improve the knowledge of the hydrogeologic setting of the lagoon and nearby coastland subsurface, irrespective of the different features characterizing the area. The environment consists of salt marshes, mud flats, shallows, tidal channels, islands, together with reclaimed farmlands crossed by natural watercourses and drainage channel networks. In particular, the AEM shows (i) the presence of fresh water (with resistivity larger than 20 Ω m) underneath the central part of the lagoon at depths from 10 to 25. m below m.s.l., (ii) the interface between different relevant stratigraphic units, e.g., the clayey layer bounding the Holocene-Pleistocene sedimentation, and (iii) the occurrence of areas with possible submarine fresh groundwater discharge. Moreover, the source and inland extent of the saltwater contamination in the shallow coastal aquifers along the southern margin of the lagoon are clearly revealed. AEM data were complemented with very high resolution seismic (VHRS) acquisitions. The integrated analysis of the two data sets allows distinguishing between lithostratigraphic heterogeneity and variability of the subsurface fluids. © 2011 Elsevier B.V.
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- 2011
106. Ground penetrating radar study of iron age tombs in Southeastern Kazakhstan
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I. Finetti, Michele Pipan, Luca Baradello, Emanuele Forte, Pipan, Michele, Baradello, L, Forte, Emanuele, and Finetti, Icilio
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Archeology ,History ,Data processing ,Noise attenuation ,Mineralogy ,Excavation ,Ranging ,Fold (geology) ,law.invention ,law ,Ground-penetrating radar ,Radar ,Seismology ,Geology ,Amplitude versus offset - Abstract
An international archaeological and geophysical expedition was carried out to study Iron Age tombs of the Saka culture in southeastern Kazakhstan. Single-fold and multifold ground-penetrating radar (GPR) surveys, in two and two and a half dimensions, focused on the identification of burial chambers beneath the mound-shaped Saka tumuli, named kourgans. Primary objectives of the geophysical study were the testing and optimization of GPR techniques for studying this type of tomb and the reconstruction of subsurface images of use for the design of archaeological excavations. Single-fold GPR grids with line spacing ranging between 50 and 200 cm were obtained at each of the 13 sites selected. After identification of the sectors of major potential interest from data processing performed directly in the field and interpretation of the single-fold grids, multifold profiles with average 1200 per cent fold were designed and performed. Processing of the data focused on velocity analyses, pre-stack coherent noise attenuation by means of FK and KL filters, stacking and analysis of the instantaneous attributes of the complex radar trace. Multifold GPR data processing techniques achieved a substantial increment in the signal to noise ratio at most sites, allowed accurate depth conversions of the stacked profiles (average deviation of estimated target location from the actual target was less than 5% of total depth) and provided indications to identify the characteristic response from the target of interest through the joint interpretation of pre-stack gathers, velocity analysis and amplitude versus offset analysis. Interpretation of stacked sections and three-dimensional models obtained from the single-fold/multifold grid allowed the identification of a burial chamber located at an estimated depth of 140–150 cm, which was excavated successfully by the archaeological team. Further reflectors with similar characteristics are shown from other sites, which will be excavated by the next archaeological expeditions to the area. Copyright © 2001 John Wiley & Sons, Ltd.
- Published
- 2001
107. 2-D and 3-D processing and interpretation of multi-fold ground penetrating radar data: a case history from an archaeological site
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Michele Pipan, I. Finetti, A. Prizzon, Luca Baradello, Emanuele Forte, Pipan, Michele, Baradello, L, Forte, Emanuele, Prizzon, A, and Finetti, Icilio
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Azimuth ,Data processing ,Depth sounding ,Geophysics ,Discontinuity (geotechnical engineering) ,Ground-penetrating radar ,Excavation ,Classification of discontinuities ,Paleosol ,Archaeology ,Geology - Abstract
A 2.5-D and 3-D multi-fold GPR survey was carried out in the Archaeological Park of Aquileia (northern Italy). The primary objective of the study was the identification of targets of potential archaeological interest in an area designated by local archaeological authorities. The second geophysical objective was to test 2-D and 3-D multi-fold methods and to study localised targets of unknown shape and dimensions in hostile soil conditions. Several portions of the acquisition grid were processed in common offset (CO), common shot (CSG) and common mid point (CMP) geometry. An 8×8 m area was studied with orthogonal CMPs thus achieving a 3-D subsurface coverage with azimuthal range limited to two normal components. Coherent noise components were identified in the pre-stack domain and removed by means of FK filtering of CMP records. Stack velocities were obtained from conventional velocity analysis and azimuthal velocity analysis of 3-D pre-stack gathers. Two major discontinuities were identified in the area of study. The deeper one most probably coincides with the paleosol at the base of the layer associated with activities of man in the area in the last 2500 years. This interpretation is in agreement with the results obtained from nearby cores and excavations. The shallow discontinuity is observed in a part of the investigated area and it shows local interruptions with a linear distribution on the grid. Such interruptions may correspond to buried targets of archaeological interest. The prominent enhancement of the subsurface images obtained by means of multi-fold techniques, compared with the relatively poor quality of the conventional single-fold georadar sections, indicates that multi-fold methods are well suited for the application to high resolution studies in archaeology.
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- 1999
108. Integrated multi-fold GPR and magnetic gradiometry study of an archaeological site in Northern Italy
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L. Baradello, M. Pipan, A. Prizzon, I. Finetti, E. Forte, Pipan, Michele, Baradello, L, Forte, Emanuele, Prizzon, A, and Finetti, I.
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medicine.medical_specialty ,Road construction ,Telmatology ,Ground-penetrating radar ,medicine ,Fold (geology) ,Magnetic survey ,Archaeology ,Geology ,Metamorphic petrology ,Northern italy - Abstract
A combined Ground Penetrating Radar (GPR) and magnetic survey was carried out in the Aquileia Archaeologecal Park (AAP, Italy) to assess the archaeological potential of a 5.000 sqm area intended for road construction.
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- 1999
109. Identification of shallow targets through integrated 2D and 3D multi-fold georadar investigation. A case history
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E. Forte, I. Finetti, Luca Baradello, M. Pipan, A. Prizzon, Pipan, Michele, Baradello, L, Finetti, I, Forte, Emanuele, and Prizzon, A.
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Cultural heritage ,Regional geology ,Glaciology ,Engineering geology ,Ground-penetrating radar ,Economic geology ,Cartography ,Palaeogeography ,Geomorphology ,Geology ,Environmental geology - Abstract
A 3D multi-fold GPR investigation was carried out in the archaeological park of Aquileia in the framework of a survey proposed by the local superintendency of cultural heritage. Primary objective of the work was the identification of targets of potential archaeological interest in a polygon of approximately 2800 sqm in area, which borders the town cemetery to the north. The comparison of single-fold and multi-fold test profiles encouraged the design of a complete multi-fold grid. The 3-D option was chosen to correlate and map targets of limited dimensions. Targets of possible archaeological interest were identified at estimated depths not exceeding 200 cm in the part of the dataset processed to date.
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- 1997
110. Footprint of sustained poleward warm water flow within East Antarctic submarine canyons.
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Donda F, Rebesco M, Kovacevic V, Silvano A, Bensi M, De Santis L, Rosenthal Y, Torricella F, Baradello L, Gei D, Leventer A, Post A, Leitchenkov G, Noble T, Zgur F, Cova A, O'Brien P, and Romeo R
- Abstract
The intrusion of relatively warm water onto the continental shelf is widely recognized as a threat to Antarctic ice shelves and glaciers grounded below sea level, as enhanced ocean heat increases their basal melt. While the circulation of warm water has been documented on the East Antarctic continental shelf, the modes of warm water transport from the deep ocean onto the shelf are still uncertain. This makes predicting the future responses of major East Antarctic marine-grounded glaciers, such as Totten and Ninnis glaciers, particularly challenging. Here, we outline the key role of submarine canyons to convey southward flowing currents that transport warm Circumpolar Deep Water toward the East Antarctic shelf break, thus facilitating warm water intrusion on the continental shelf. Sediment drifts on the eastern flank of the canyons provide evidence for sustained southward-directed flows. These morpho-sedimentary features thus highlight areas potentially prone to enhanced ocean heat transport toward the continental shelf, with repercussions for past, present, and future glacial melting and consequent sea level rise., (© 2024. The Author(s).)
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- 2024
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111. Two enigmatic ridges in the Pantelleria Vecchia Bank (NW Sicilian Channel).
- Author
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Lodolo E, Nannini P, Baradello L, and Ben-Avraham Z
- Abstract
The Pantelleria Vecchia Bank is a submerged calcareous-arenitic shoal in the NW sector of the Sicilian Channel. Together with other morphological heights, some of which are volcanic in origin, this shoal punctuates the shallow Adventure Plateau, which was above sea level from the Last Glacial Maximum until at least 9000 years ago. The rise in sea level caused by the melting of the ice caps gradually flooded the plateau, isolating the heights and creating a broad archipelago until the area was finally submerged. High-resolution Multibeam bathymetric mapping shows that the Pantelleria Vecchia Bank has an 820 m long rectilinear ridge connecting the two main shoals of the bank, and an 82 m long ridge perpendicular to the 820 m ridge 100 m from its southern end. The top of the 820 m ridge lies in a water depth of 35 m, its base in about 42 m, and the seaward side has a fairly uniform slope of 16°-22°. The 82 m ridge has an average width of ∼7 m and rises ∼1 m above the surrounding seafloor. Underwater photographs document that the entire seaward side of the 820 m ridge consists of juxtaposed blocks, the largest measuring about 3 × 4 m, some of which are rectangular in shape, while the upper part consists of horizontally arranged blocks and the lower part of sub-vertical blocks embedded in the sediments. Petrographic analyses show that the blocks forming the seaward side of the 820 m ridge can be classified as late Pleistocene calcirudites, while the 82 m ridge consists of bioclastic calcarenites of Tortonian age. A series of high-resolution seismic profiles crossing both ridges and composite mosaics of the seafloor obtained from underwater videos provide a comprehensive panorama of these two peculiar and in many ways enigmatic structures. The structures described and the palaeogeographical context in which they are embedded do not exclude the possibility that they are artefacts indicating an ancient temporary or permanent human presence in the Pantelleria Vecchia Bank., Competing Interests: The authors declare no conflict of interest., (© 2023 The Authors. Published by Elsevier Ltd.)
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- 2023
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112. The submerged footprint of Perito Moreno glacier.
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Lodolo E, Donda F, Lozano J, Baradello L, Romeo R, Bran DM, and Tassone A
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Perito Moreno is the most famous calving glacier of the South Patagonia Icefield, the largest temperate glacier system of the Southern Hemisphere. Unlike most of the glaciers in the region that have strongly retreated in recent decades, the position of Perito Moreno glacier front remained relatively unchanged in the last century. However, earliest photographic documents show that, at the end of the nineteenth century, the front was ca. 800 m behind the current position. There is no reliable information about the positions of the Perito Moreno front in earlier times. Here we show evidence of two subaqueous moraine systems both in the Canal de Los Témpanos and in the Brazo Rico, the two arms of Lago Argentino along which Perito Moreno glacier has flowed over time. These moraines, identified for the first time in the Canal de Los Témpanos from bathymetric and high-resolution seismic profiles, mark the position of the largest glacier advance, tentatively correlated with the moraines of the "Herminita advance" identified and dated onland. We interpret these bedforms as the evidence of the most pronounced advance of Perito Moreno glacier during the mid-Holocene cooling event that characterized this sector of the Southern Hemisphere. This study highlights the importance of subaqueous glacial bedforms, representing decisive records of the glacial history and palaeoclimate, which could help unveiling the origin of the different behavior of glaciers like Perito Moreno that in a warming climate are relatively stable.
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- 2020
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113. Paleochannel and beach-bar palimpsest topography as initial substrate for coralligenous buildups offshore Venice, Italy.
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Tosi L, Zecchin M, Franchi F, Bergamasco A, Da Lio C, Baradello L, Mazzoli C, Montagna P, Taviani M, Tagliapietra D, Carol E, Franceschini G, Giovanardi O, and Donnici S
- Abstract
We provide a model for the genesis of Holocene coralligenous buildups occurring in the northwestern Adriatic Sea offshore Venice at 17-24 m depth. High-resolution geophysical surveys and underwater SCUBA diving reconnaissance revealed meandering shaped morphologies underneath bio-concretionned rocky buildups. These morphologies are inferred to have been inherited from Pleistocene fluvial systems reactivated as tidal channels during the post- Last Glacial Maximum transgression, when the study area was a lagoon protected by a sandy barrier. The lithification of the sandy fossil channel-levee systems is estimated to have occurred at ca. 7 cal. ka BP, likely due to the interaction between marine and less saline fluids related to onshore freshwater discharge at sea through a sealed water-table. The carbonate-cemented sandy layers served as nucleus for subsequent coralligenous buildups growth.
- Published
- 2017
- Full Text
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