1,721,243 research outputs found
Defining the causes of ancient building collapse (structural decaying vs. seismic shaking) in archaeological deposits of central Italy
No full textDeposits that result from the collapse of buildings are usual in geoarchaeological records. Deposition can result from natural processes
or can be induced by human actions. The investigations at archaeological sites (in particular of the Roman Imperial Age) in central
Italy indicate that the analysis of the sedimentological-stratigraphic characteristics of collapse layers allows hypotheses as to the origin
of a deposit. In the case of layers formed by building decay or seismic destruction, the stratigraphic analysis defines substantial
differences that are indicative of different origins. Indeed, the stratigraphy of collapse deposits due to building decay is made up of
fine-to-coarse grained layers, due to the slow accumulation of materials, which are capped by huge fragments of buildings following
the final collapse of the structure. For seismic destruction, large fragments of walls or entire pillars and columns, plus the coarse-grained
ruins, usually lie over floors and pavements without interposed layers of abandonment. The characterisation of a collapse deposit
has implications in archaeoseismological research, i.e. the identification of traces of past earthquakes during archaeological excavations
or through the analysis of the archaeological monumental heritage.Published73-823.10. Storia ed archeologia applicate alle Scienze della TerraN/A or not JCRreserve
Defining the causes of ancient building collapse (structural decaying vs. seismic shaking) in archaeological deposits of central Italy
No full textDeposits that result from the collapse of buildings are usual in geoarchaeological records. Deposition can result from natural processes
or can be induced by human actions. The investigations at archaeological sites (in particular of the Roman Imperial Age) in central
Italy indicate that the analysis of the sedimentological-stratigraphic characteristics of collapse layers allows hypotheses as to the origin
of a deposit. In the case of layers formed by building decay or seismic destruction, the stratigraphic analysis defines substantial
differences that are indicative of different origins. Indeed, the stratigraphy of collapse deposits due to building decay is made up of
fine-to-coarse grained layers, due to the slow accumulation of materials, which are capped by huge fragments of buildings following
the final collapse of the structure. For seismic destruction, large fragments of walls or entire pillars and columns, plus the coarse-grained
ruins, usually lie over floors and pavements without interposed layers of abandonment. The characterisation of a collapse deposit
has implications in archaeoseismological research, i.e. the identification of traces of past earthquakes during archaeological excavations
or through the analysis of the archaeological monumental heritage.Published73-823.10. Storia ed archeologia applicate alle Scienze della TerraN/A or not JCRreserve
Criteri e procedure per la compilazione di un inventario speditivo delle sorgenti potenziali di terremoti distruttivi finalizzato alla compilazine di una nuova mappa delle zone sismogenetiche per l'area italiana
No full textActive tectonics in Italy: History of the research and present geological knowledge
No full textActive tectonics in Italy: History of the research and present geological knowledgePublishedRimini3.10. Sismologia storica e archeosismologiaope
Active tectonics in Italy: History of the research and present geological knowledge
No full textActive tectonics in Italy: History of the research and present geological knowledgePublishedRimini3.10. Sismologia storica e archeosismologiaope
Quaternary tectonics and large-scale gravitational deformations with evidence of rock-slide displacements in the Central Apennines (central Italy)
No full textEight cases of large-scale gravitational movements (with evidence of rock-slide type displacements) evolving close to Quaternary
faults have been analysed in the Central Apennines. Geomorphological and structural surveys have defined the relationship between
the gravitational displacements and the tectonically-controlled modifications of the landscape. The evolution of all the investigated
cases has been conditioned by the presence of fault planes located along the mountain slopes. In most cases (Mt. Cefalone, Cima della
Fossa, Villavallelonga, Casali d'Aschi, Gioia dei Marsi), the faults played or are playing a primary role in increasing the local relief
and their activity represents the main geomorphic factor conditioning the gravitational movements. This kind of relationship has been
observed along mountain slopes bordering depressions which have not been drained for most of their geomorphic history or have been
characterised by an evolution of the hydrographic network that has been conditioned only by the local tectonic subsidence. In such
cases, the gravitational movements develop in the footwalls of the faults. In other cases (Fiamignano, Pescasseroli) the faults have
played a passive role, since they only bound the sliding masses and coincide with the surficial expressions of the sliding planes.
Therefore, the gravitational displacements develop in the hangingwall of the faults. The evolution is conditioned by the incision of the
hydrographic network in response to regional Quaternary uplift. The illustrated case studies provide a wide range of examples of the
gravitational response of slopes to the modifications of the landscape due to linear and areal tectonics. The identification of the
geomorphic traces of the large-scale gravitational movements along fault-controlled mountain fronts has implications for hazard,
particularly for the evolution of the displacement. The quantitative analysis of the vertical displacements and data on the characteristics
of the surface breaking during historical earthquakes demonstrate that along-fault offsets strongly increases where the unstable
large-scale rock masses are located. Therefore, the large coseismic vertical offset may represent a major problem for the displacement
of utilities and may represent a potential cause for the sudden and catastrophic evolution of the gravitational movement.Published201-228JCR Journalreserve
De verwoesting van Alba: de evidentie van de laat-antieke aardbeving
No full textDe verwoesting van Alba: de evidentie van de laat-antieke aardbevingPublished179-1863.10. Sismologia storica e archeosismologiareserve
De verwoesting van Alba: de evidentie van de laat-antieke aardbeving
No full textDe verwoesting van Alba: de evidentie van de laat-antieke aardbevingPublished179-1863.10. Sismologia storica e archeosismologiareserve
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