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  • 1
    Publication Date: 2021-03-10
    Description: The Gulf of Patti and its onshore sector represent one of the most seismically active regions of the Italian Peninsula. Over the period 1984–2014, about 1800 earthquakes with small-to-moderate magnitude and a maximum hypocentral depth of 40 km occurred in this area. Historical catalogues reveal that the same area was affected by several strong earthquakes such as the Mw = 6.1 event in April 1978 and the Mw = 6.2 one in March 1786 which have caused severe damages in the surrounding localities. The main seismotectonic feature affecting this area is represented by a NNW–SSE trending right-lateral strike-slip fault system called “Aeolian–Tindari–Letojanni” (ATLFS) which has been interpreted as a lithospheric transfer zone extending from the Aeolian Islands to the Ionian coast of Sicily. Although the large-scale role of the ATLFS is widely accepted, several issues about its structural architecture (i.e. distribution, attitude and slip of fault segments) and the active deformation pattern are poorly constrained, particularly in the offshore. An integrated analysis of field structural geology with marine geophysical and seismological data has allowed to better understand the structural fabric of the ATLFS which, in the study area, is expressed by two major NW–SE trending, en-echelon arranged fault segments. Minor NNE–SSW oriented extensional structures mainly occur in the overlap region between major faults, forming a dilatational stepover. Most faults display evidence of active deformation and appear to control the main morphobathymetric features. This aspect, together with diffused continental slope instability, must be considered for the revaluation of the seismic and geomorphological hazard of this sector of southern Tyrrhenian Sea.
    Description: Published
    Description: 253–272
    Description: 2T. Tettonica attiva
    Description: JCR Journal
    Description: restricted
    Keywords: Active faulting ; Continental slope instability ; North-eastern Sicily ; Gulf of Patti ; Seismic profiles ; 04. Solid Earth::04.04. Geology::04.04.01. Earthquake geology and paleoseismology ; 04. Solid Earth::04.04. Geology::04.04.03. Geomorphology ; 04. Solid Earth::04.04. Geology::04.04.04. Marine geology
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 2
    Publication Date: 2021-05-12
    Description: In this paper we present a morphotectonic study of the Paganica–San Demetrio fault system (PSDFS) responsible for the Mw6.1 April 6, 2009 earthquake (L'Aquila, Central Italy). The discrepancy observed between the length of the seismologic–geodetic modeled fault, the limited size of the primary coseismic surface ruptures and the significant morphological expression of the PSDFS stimulated a debate about the maximum rupture length of the PSDFS and its capability to generate larger magnitude events. To image the PSDFS long-term morphological expression and define its surface geometrical arrangement (length, number of fault splays and boundaries), we took advantage of a high-resolution airborne LiDAR dataset. LiDAR topography substantially increased our confidence in detecting even subtle tectonic-controlled morphologies. We define the PSDFS as a ~ 19 km-long fault system that displays a complex structural setting characterized by two different sectors: 1) the Paganica sector to the NW, with a narrow deformation zone, and 2) the San Demetrio sector to SE, where the strain is accommodated by several fault-splays dissecting a wider Quaternary basin. We also defined a first-order hierarchy among the numerous fault splays across the PSDFS. The long-term geomorphic expression of the PSDFS suggests that it ruptured also involving the whole 19 km-long structure besides rupturing only small sections, as it occurred in 2009. This suggests a variable slip behavior. Empirical relations applied to this hypothesis allow up to M 6.6 earthquakes along the PSDFS. These results have a critical impact on the seismic hazard assessment of the area when compared with a M 6.1 event as the 2009.
    Description: Published
    Description: 108-121
    Description: 2T. Tettonica attiva
    Description: JCR Journal
    Description: restricted
    Keywords: Active normal faulting; Tectonic geomorphology; Airborne LiDAR; 2009 L'Aquila earthquake ; 04. Solid Earth::04.04. Geology::04.04.01. Earthquake geology and paleoseismology ; 04. Solid Earth::04.04. Geology::04.04.03. Geomorphology
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 3
    Publication Date: 2021-06-03
    Description: Il bacino di Leonessa è una delle maggiori depressioni tettoniche intermontane dell’Appennino Centrale. A differenza delle altre depressioni, disposte in direzione appenninica con la faglia bordiera principale sul lato orientale, il bacino è orientato in senso WNW-ESE ed ha la faglia bordiera principale sul suo margine sud-occidentale. Questo studio ha permesso di ricostruire l’evoluzione quaternaria del bacino attraverso un approccio multimetodologico basato sull’integrazione dei dati provenienti dal rilevamento geologico e geomorfologico a scala di dettaglio (1:10.000), supportato dall’interpretazione di fotografie aeree, da analisi paleontologico-stratigrafiche, paleomagnetiche, palinologiche e mineralogico-petrografiche. I sedimenti affioranti all’interno della depressione sono stati distinti in sintemi. Quello stratigraficamente più basso è il Sintema di Villa Pulcini – Colle Montano, costituito da un alternanza di argille, argille torbose, marne e sabbie argillose di ambiente deposizionale da lacustre a piana alluvionale a canali intrecciati (braided plain), attribuibile alla parte alta del Pleistocene inferiore. Stratigraficamente superiore al Sintema di Villa Pulcini – Colle Montano, il Sintema di Leonessa è costituito da depositi di conoide alluvionale nel settore occidentale del bacino e da depositi lacustri nel settore orientale, ambedue contenenti, nella parte alta, intercalazioni di vulcaniti risedimentate. Il ritrovamento di un molare di Mammuthus (mammuthus) cfr.M. (M.) trogontherii (Pohlig) all’interno di depositi alluvionali e i risultati delle analisi paleomagnetiche e palinlogiche consentono di riferire al Pleistocene medio il sintema.I due sintemi precedenti sono coperti a tratti da sabbie e sabbie argillose rossastre (Sintema di Terzone), con spessore che raramente supera i 5 metri, ricche di elementi vulcanici rimaneggiati. I sintemi stratigraficamente più alti del bacino sono costituiti da tre ordini di terrazzi fluviali e da due ordini di conoide alluvionale denominati Sintema di Cerreto - Monte Tilia1, Sintema di Fosso della Ripa e Sintema di Villa Falcucci – Monte Tilia2. Questi sono probabilmente da riferirsi al Pleistocene superiore – Olocene. La definizione degli eventi erosivo-deposizionali che hanno contraddistinto l’evoluzione del paesaggio nel bacino di Leonessa costituisce un passo ulteriore verso un più preciso inquadramento temporale dell’attività tettonica distensiva, del sollevamento regionale e dei cambiamenti climatici che hanno portato all’attuale assetto geomorfologico dell’Appennino Centrale.
    Description: Published
    Description: Roma
    Description: 3.2. Tettonica attiva
    Description: open
    Keywords: Bacino di Leonessa ; Evoluzione quaternaria ; Appennino Centrale ; 04. Solid Earth::04.04. Geology::04.04.03. Geomorphology
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: Poster session
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  • 4
    Publication Date: 2021-06-03
    Description: This paper illustrates a geographic information system (GIS) supported methodology for the assessment of landslide susceptibility. The methodology involves four operational steps: survey, site analysis, macro- area analysis and susceptibility analysis . The Survey includes the production (or acquisition) of a large-scale litho-technical map, a large-scale geomorphological map, a detailed inventory of past and present land- slide events, and a high resolution DTM (Digital Terrain Model. Site analysis leads to the definition of discriminating parameters (commonly, lithological and morphometric conditions necessary but not suffi- cient to trigger a landslide of a given type) and predisposing factors (conditions that worsen slope stability but are not sufficient to trigger a landslide of a given type in the absence of discriminating parameters ). The different predisposing factors are subdivided into classes, whose intervals are established by descriptive, statistical analysis of landslide inventory data. A numerical index, based on the frequency of landslide occurrence, quantifies the contribution of each class to slope instability. Macro-area analysis includes the generation of Litho-Morphometric Units (LMU) by overlaying discrimina- ting parameters , manual drawing of LMU envelopes ( macro-areas ), generation of predisposing factor maps from the spatial distribution of predisposing factors , and heuristic weighting of predisposing factor indices. Susceptibility analysis includes the generation of Homogeneous Territorial Units (HTU) by overlaying macro- areas and predisposing factor maps , and the application of a susceptibility function to the different HTU. The resulting values are normalized before the generation of the landslide susceptibility maps . The methodo- logy has been applied to the Fiumicino River catchment, located in the western side of Latium Apennine (Central Italy) between 200 and 1300 m a.s.l. and developed on Late Miocene calcarenites, sandstones with clay intercalations, and marls. The resulting landslide susceptibility maps will be employed in envi- ronmental management. They also represent the preliminary step for the assessment of landslide hazard and risk
    Description: Published
    Description: 87-93
    Description: 5.5. TTC - Sistema Informativo Territoriale
    Description: JCR Journal
    Description: restricted
    Keywords: Landslide; Geomorphology ; GIS Methodology ; 04. Solid Earth::04.04. Geology::04.04.03. Geomorphology ; 05. General::05.01. Computational geophysics::05.01.05. Algorithms and implementation ; 05. General::05.06. Methods::05.06.99. General or miscellaneous ; 05. General::05.08. Risk::05.08.02. Hydrogeological risk
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 5
    Publication Date: 2021-07-14
    Description: New data on the ancient landscape of Naples (southern Italy) during the middle and late Holocene from geo-archaeological excavations associated with public transport works were used to reconstruct the hill and coastal environment to the west of the ancient Graeco-Roman polis, where remains of human settlements date to the late Neolithic. The rich stratigraphic and archaeological records that emerged from the digs and from previous boreholes were measured and analysed by combining sedimentary facies analysis, tephrostratigraphy and archaeological data. Between the 5th and 4th millennia BP, a rocky profile with a wave-cut platform cutting across pyroclastites emplaced from the surrounding volcanoes was predominant in the coastal landscape. During the 3rd millennium BP, this rocky coast was progressively replaced by a sandy littoral environment primarily due to marine deposition, with a coastline located some hundred meters inland with respect to the modern one. The sedimentary record of the Greek and Roman periods indicates short-term fluctuations of the coastline, leading to the establishment of a backshore environment towards the end of the 6th century AD, when prograding river mouths and lobes of debris flows contributed to the advancing trend of the shoreline. The frequent archaeological remains from these periods indicate a stable settled area since Roman times. The shoreline was still subject to short-lived fluctuations between the 12th and 16th centuries, and attained its present position during the modern era with man-made reshaping of its profile. The construction of Relative Sea Level curves for two coastal sites reveals that the persistence of the foreshore environment in the Naples coastal strip during the 5th and 4th millennia BP was controlled by the counterbalancing effect of either the concurrent eustatic sea level rise or subsidence. On the other hand, the morpho-stratigraphic record for the last two millennia shows a significant correlation between sedimentation rate and settlement history, accounting for the dominant role of the anthropogenic forcing-factor in late Holocene landscape history. In particular, land mismanagement during Late Antiquity seems to have triggered a slope disequilibrium phase, exacerbating soil erosion and increasing the sediment accumulation rate in both foothill and coastal areas. Nonetheless, the environmental changes of the Chiaia coast during the last 2000 years clearly show volcanicetectonic perturbations influencing coastline development up to the modern era.
    Description: Published
    Description: 107-119
    Description: 3.5. Geologia e storia dei vulcani ed evoluzione dei magmi
    Description: 3.10. Storia ed archeologia applicate alle Scienze della Terra
    Description: JCR Journal
    Description: reserved
    Keywords: study ; Naples coastline ; the last 6000 years ; 04. Solid Earth::04.04. Geology::04.04.03. Geomorphology ; 04. Solid Earth::04.04. Geology::04.04.10. Stratigraphy ; 04. Solid Earth::04.08. Volcanology::04.08.05. Volcanic rocks
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 6
    Publication Date: 2020-11-18
    Description: Morphologic data for 147 cinder cones in southern Guatemala andwestern El Salvador are comparedwith data from the San Francisco volcanic field, Arizona (USA), Cima volcanic field, California (USA), Michoácan–Guanajuato volcanic field, Mexico, and the Lamongan volcanic field, East Java. The Guatemala cones have an average height of 110+/-50 m, an average basal diameter of 660+/-230 m and an average top diameter of 180+/-150 m. The generalmorphology of these cones can be described by their average cone angle of slope (24+/-7), average heightto- radius ratio (0.33+/-0.09) and their flatness (0.24+/-0.18). Although the mean values for the Guatemalan cones are similar to those for other volcanic fields (e.g., San Francisco volcanic field, Arizona; Cima volcanic field, California; Michoácan–Guanajuato volcanic field, Mexico; and Lamongan volcanic field, East Java), the range of morphologies encompasses almost all of those observed worldwide for cinder cones. Three new 40Ar/39Ar age dates are combined with 19 previously published dates for cones in Guatemala and El Salvador. There is no indication that the morphologies of these cones have changed over the last 500–1000 ka. Furthermore, a re-analysis of published data for other volcanic fields suggests that only in the Cima volcanic field (of those studied) is there clear evidence of degradation with age. Preliminary results of a numerical model of cinder cone growth are used to show that the range of morphologies observed in the Guatemalan cinder cones could all be primary, that is, due to processes occurring at the time of eruption.
    Description: Support for Walker was provided by NSF MARGINS grant OCE- 0405666.
    Description: Published
    Description: 39-52
    Description: 1.5. TTC - Sorveglianza dell'attività eruttiva dei vulcani
    Description: 3.5. Geologia e storia dei vulcani ed evoluzione dei magmi
    Description: 3.6. Fisica del vulcanismo
    Description: JCR Journal
    Description: open
    Keywords: cinder cones ; morphology ; age dating ; 04. Solid Earth::04.01. Earth Interior::04.01.99. General or miscellaneous ; 04. Solid Earth::04.04. Geology::04.04.99. General or miscellaneous ; 04. Solid Earth::04.04. Geology::04.04.03. Geomorphology ; 04. Solid Earth::04.04. Geology::04.04.09. Structural geology ; 04. Solid Earth::04.08. Volcanology::04.08.99. General or miscellaneous ; 05. General::05.02. Data dissemination::05.02.03. Volcanic eruptions
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 7
    Publication Date: 2020-12-21
    Description: BREVIA
    Description: We report on the discovery in southern Egypt of an impact crater 45 m in diameter with a pristine rayed structure. Such pristine structures have been previously observed only on atmosphereless rocky or icy planetary bodies in the Solar System. This feature and the association with an iron meteorite impactor and shock metamorphism provides a unique picture of small-scale hypervelocity impacts on the Earth's crust. Contrary to current geophysical models, ground data indicate that iron meteorites with masses of the order of tens of tons can penetrate the atmosphere without significant fragmentation.
    Description: Published
    Description: 804
    Description: 1.8. Osservazioni di geofisica ambientale
    Description: 3.8. Geofisica per l'ambiente
    Description: JCR Journal
    Description: open
    Keywords: Impact crater ; Egypt ; geophysical exploration ; ataxite ; 04. Solid Earth::04.04. Geology::04.04.03. Geomorphology
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 8
    Publication Date: 2020-12-21
    Description: Small impact craters (〈300 m in diameter) are rare on Earth and mostly deeply eroded, so that knowledge of their formation mechanism and the hazard small impactors constitute to human populations is largely based on physical models. We report on the geophysical investigation of the Kamil Crater we recently discovered in southern Egypt. The Kamil Crater is a 〈5 k.y. old impact crater 45 m in diameter, with a pristine ejecta ray structure. Such well-preserved structures have been previously observed only on extraterrestrial rocky or icy planetary bodies. This crater feature, and the association with an iron meteorite impactor and shock metamorphism, provides a unique impression of aspects of small-scale hypervelocity impacts on the Earth’s crust. Contrary to current models, ground data indicate that iron meteorites with masses of tens of tons may be able to penetrate the atmosphere without substantial fragmentation.
    Description: Published
    Description: 179-182
    Description: 1.8. Osservazioni di geofisica ambientale
    Description: 3.8. Geofisica per l'ambiente
    Description: JCR Journal
    Description: restricted
    Keywords: impact cratering ; iron meteorites ; shock metamorphism ; Kamil Crater ; Gebel Kamil ; meteorite ; Egypt ; 04. Solid Earth::04.04. Geology::04.04.03. Geomorphology
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 9
    Publication Date: 2021-04-07
    Description: Topography of the Apennines chain resulted from the combined action of tectonic displacements (related to thrusting and high-angle faulting), large-scale uplift and surface processes. In such mountainous settings, where strong erosion is often responsible for incomplete stratigraphic records of surface evolution of thrust belts, geomorphological analysis helps quantify these processes and provide a framework for interpreting the geologic history of these regions. We studied a 400 km2 area of the Central-Southern Apennines, covering Abruzzo, Lazio and Molise regions, by means of morphostructural analysis. This sector of the chain emerged during the Lower Pliocene and suffered a long-lasting erosion. Our study reveals a high relief landscape dominated by high-standing, resistant carbonates forming structure-controlled landforms (morphosculptures), and valleys underlain by erodible siliciclastics. Quaternary deposits are few and scattered, and they give poor constraints for the recognition of ancient base-levels. However, this study defines and identifies several upland erosional surfaces (paleosurfaces) that may be linked to ancient base-levels. On the basis of cross-cut relationships between paleosurfaces and structural landforms, we outlined a possible long-term geomorphological evolution of the study area. Most of the local tectonic displacements in this sector of the chain took place during Miocene and Pliocene, by means of thrusting and strike-slip faulting, whereas only localized extensional tectonics occurred during Quaternary times. Since the Pliocene, differential erosion promoted exhumation of carbonates and deep incision of pre-existing erosional surfaces. This strong erosion can be related to a regional base-level lowering promoted by large-scale uplift of the axial sector of the Central-Southern Apennines.
    Description: MIUR (60%), responsible: prof. L. D'Alessandro, Università degli Studi di Chieti, "G. D'Annunzio"
    Description: Published
    Description: 13-32
    Description: 3.2. Tettonica attiva
    Description: N/A or not JCR
    Description: reserved
    Keywords: Morphostructure ; Morphosculpture ; Paleosurface ; Exhumation ; Central-Southern Apennines ; 04. Solid Earth::04.04. Geology::04.04.03. Geomorphology
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 10
    Publication Date: 2021-06-03
    Description: Il bacino di Leonessa è una delle maggiori depressioni tettoniche intermontane dell’Appennino Centrale. A differenza dalle altre depressioni, disposte in direzione appenninica con la faglia bordiera principale sul lato orientale, il bacino è orientato in senso WNW - ESE ed ha la faglia bordiera principale sul suo margine sud-occidentale. Il più antico deposito di origine continentale che riempie la depressione non è affiorante ed è stato rinvenuto solo in alcuni sondaggi. E’ costituito da alternanze di sabbie-argillose e ghiaie (attribuite da GE.MI.NA. ad un generico Pliocene). I sedimenti affioranti sono stati distinti in sintemi. Quello stratigraficamente più basso è il Sintema di Villa Pulcini, costituito da un alternanza di argille, argille torbose, marne e sabbie argillose di ambiente deposizionale da lacustre a piana a canali intrecciati (braided plain), attribuibili alla parte alta del Pleistocene inferiore. Il Sintema di Villa Pulcini è parzialmente coperto dal Sintema di Leonessa, costituito da depositi di conoide alluvionale (conoide della Vallonina) a ovest e da depositi lacustri a est, ambedue contenenti, nella parte alta, intercalazioni di vulcaniti risedimentate. Il ritrovamento di un molare di M. (M.) trogontherii all’interno di depositi alluvionali consente di riferire al Galeriano (U.F. Slivia - ? U.F. Fontana Ranuccio) la porzione basale del sistema. I due sintemi precedenti sono coperti a tratti da sabbie e sabbie argillose rossastre (Sintema di Terzone), con spessore che raramente supera i 5 metri, ricche di elementi vulcanici rimaneggiati. Nella parte più meridionale del bacino, all’interno della profonda incisione del Fosso Tascino, sono localmente presenti due ordini di terrazzi alluvionali. Attualmente il Fosso Tascino mostra un tipico esempio di letto a canali intrecciati (braided), con una piana che supera i 100 m di larghezza. Nella zona di raccordo tra il versante NE del Monte Tilia e i Sintemi di Leonessa e di Terzone, sono stati riconosciuti due ordini di conoidi alluvionali sovrapposti, costituiti in prevalenza da sedimenti ghiaiosi con una minore componente sabbiosa, poggianti in discordanza sui sedimenti più antichi. La definizione degli eventi erosivo-deposizionali che hanno contraddistinto l’evoluzione del paesaggio nel bacino di Leonessa costituisce un passo ulteriore verso un più preciso inquadramento temporale dell’attività tettonica distensiva, del sollevamento regionale e dei cambiamenti climatici che hanno portato all’attuale assetto geomorfologico dell’Appennino Centrale.
    Description: Published
    Description: 3.2. Tettonica attiva
    Description: N/A or not JCR
    Description: open
    Keywords: Evoluzione quaternaria ; Quaternary evolution ; sintemi ; Leonessa ; 04. Solid Earth::04.04. Geology::04.04.03. Geomorphology
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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