1,721,303 research outputs found
Late evolution of the inner Northern Apennines from the structure of the Monti del Chianti-Monte Cetona ridge (Tuscany, Italy)
No full textThe Neogene and Quaternary tectonic evolution of the inner Northern Apennines (i.e southern Tuscany and northern Tyrrhenian Sea), as well as its crustal features (i.e. low crustal thickness, Neogene-Quaternary magmatism, widespread geothermal anomalies, lateral segmentation of the stacked tectonic units, extensive deep sedimentary basins), are framed in different geodynamic scenarios: compressional, extensional or both, pulsing. Consequently, the basin and range structure that characterises the northern Tyrrhenian Sea and southern Tuscany is considered as a consequence of (i) out-of-sequence thrusts and related thrust-top-basins, (ii) polyphased normal faulting that formed horst and graben structures or (iii) a combination of both. This paper provides a new dataset from a sector of the eastern inner Northern Apennines (i.e. Monti del Chianti - Monte Cetona ridge) contributing to this scientific debate. New fieldwork and structural analysis carried out in selected areas along the ridge allowed to define the chronology of the main tectonic events on the basis of their influence on the marine and continental sedimentation. The dataset supports for early Miocene - (?) Serravallian in-sequence and out-of-sequence thrusting. Thrusting produced complex staking patterns of Tuscan and Ligurian Units. Extensional detachments developed since later middle Miocene and controlled the Neogene sedimentation in bowl-shaped structural depressions, later dissected by normal faults enhancing the accommodation space for Pliocene marine deposits in broad NNW-trending basins (Siena-Radicofani and Valdichiana Basins). In this perspective, no data supports for active, continuous or pulsing, compressional tectonics after late Serravalian. As a result, in the whole inland inner Northern Apennines the extensional tectonics was continuously active at least since middle Miocene and controlled the basins development, magmatism and structure of the crust and lithosphere
La fissure-ridge di travertino delle Terme di S. Giovanni (Rapolano Terme, Toscana meridionale) e sue implicazioni tettoniche.
No full textI travertini delle Terme di S.Giovanni (Rapolano Terme, Appennino Settentrionale) e loro implicazione neotettonica.
No full textTectonic and sedimentary evolution of the Upper Valdarno Basin: new insights from the lacustrine S. Barbara Basin
No full textWe describe stratigraphic, structural and kinematic data from the sediments of the Upper Pliocene Santa Barbara Basin and from its substratum. The results shed light on the relationships between tectonics and sedimentation in the larger Late Pliocene-Middle Pleistocene Upper Valdarno Basin of which the Santa Barbara Basin is considered a precursor. The sediments filling up the Santa Barbara Basin are made up of alluvial to deltaic and lacustrine deposits, grouped in the Castelnuovo dei Sabbioni (CSB) Synthem, related to Late Pliocene. This synthem was deposited in a tectonic depression reasonably delimited to the East by a west-dipping normal fault system and delimited to the North and to the South by left-lateral trans-tensional shear zones, which controlled the main directions of the alluvial drainage. During Early Pleistocene, a new master normal fault system (Trappola fault system) developed further to the East, determining the widening of the previous tectonic depression, now delimited to the North and to the South by the regional Piombino-Faenza and Arbia-Val Marecchia transfer zones, respectively. In this new tectonic depression, with a dominant axial drainage direction, alluvial, fluvio-aeolian and fluvial sediments (Montevarchi Synthem, VRC) deposited during Early Pleistocene. The VRC Synthem, being located in the hanging-wall of the Trappola normal fault system, is slightly tilted to the NE. Finally, during Early-Middle Pleistocene, axial fluvial deposits (Torrente Ciuffenna Synthem, UFF), sealed the previously formed brittle structures. Our kinematic and structural data allow us to confirm the interpretation that the Santa Barbara Basin is the precursor of the Upper Valdarno Basin and that both basins developed in structural depressions formed by the interplay between normal and transfer faults, framed in the extensional tectonics which characterizes Tuscany since Miocene
Declarative continuous reasoning in the cloud-IoT continuum
No full textDeveloping and releasing multiservice applications rely upon a pipeline of automation tools known as Continuous Integration/Continuous Deployment. Among those tools, continuous reasoning is exploited by large companies to perform incremental static analyses on their code commits as soon as they are integrated into a shared codebase. In this article, we extend continuous reasoning towards the continuous QoS- and context-aware management of multiservice applications in Cloud-IoT scenarios. We propose a novel continuous reasoning methodology that supports runtime decision on service placement by reacting both to changes in the infrastructure and in the application requirements, and capable of suggesting migrations only for services affected by such changes. The methodology is prototyped in Prolog and assessed through simulations over a realistic use case and over a lifelike motivating scenario at increasing infrastructure sizes. Experimental results show that our approach brings considerable speed-up in comparison with an exhaustive search employing non-incremental reasoning
Geological setting of the Bagno Vignoni area (northern side of the Mt. Amiata geothermal area, Italy): collisional structures recorded in the Tuscan Nappe
No full textGeological studies carried out in the Bagno Vignoni area (southern Tuscany) for the realisation of the new Geological Map of Tuscany (1:10,000 scale), and the interpretation of the Cro.P.18 crustal seismic line, highlighted new structural data for the Tuscan Nappe occurring on the northern side of the Mt. Amiata geothermal area. The Tuscan Nappe was affected by polyphase tectonics, as documented by structural data mainly detected from map-scale and microstructural analyses. The Tuscan Nappe in the Bagno Vignoni area consists of small outcrops emerging from Ligurian l.s. Units, mainly composed of the <> Unit. The Tuscan Nappe is typified by repetitions of its stratigraphical succession due to the presence of imbricate thrusts. They are associated with a collisional, southeast-verging thrust system which produced three Tuscan Nappe subunits, highlighted by field mapping and borehole stratigraphy. The lowermost outcropping subunit (SU3) is composed of the stratigraphical succession ranging from the <>. Fm. to the <> Fm.; the overlying SU2 is characterised only by the <> and <> Fms., whereas the uppermost SU1 is composed of the <> Fm. and the <> Fm. The Tuscan Nappe subunits stack was later deformed by Early-Middle Miocene low-angle normal faults which produced widespread tectonic elision between the thickened Tuscan Nappe and Ligurian Units. In fact, in the study area, the <> Unit, mainly composed of <> and <> Fms., lies on different Tuscan Nappe formations, suggesting the tectonic elision of the uppermost Tuscan Nappe formations, of the Subligurian Unit and of the lowermost formations of the <> Unit. On the whole, Tuscan Nappe collisional structures occur-ring in the Bagno Vignoni area represent relict structures preserved during extensional tectonics. The evidence also demonstrates the occurrence of collisional structures in the northern part of the Mt. Amiata geothermal area, as well as in the western and eastern sides (Mt. Aquilaia-Mt. Buceto and Poggio Zoccolino-Campiglia d'Orcia)
Estimating costs of multi-component enterprise applications
Full text linkEstimating the cost of a multi-component application (e.g., its resource or energy consumption) isfundamental in nowadays enterprise IT, especially if we consider that current pricing models are mainly payper-use. While this is still manageable on small applications, it is really hard to manually estimate the cost oflarge-scale enterprise applications involving hundreds of interdependent application components. In this article,we formalise the problem of estimating costs of multi-component applications, by representing the structure ofan application as a typed directed graph, and by allowing to associate different types of costs with differentapplication components. We show that costs can be fully customised, and that associating different costs withthe same application leads to different cost estimation problems defined on that application.We then present anapproach for solving cost estimation problems on multi-component applications, which is based on terminatingand confluent graph transformations. We also present a prototype implemenation of our approach, which weuse to run a case study based on a third-party application
Simulating FogDirector Application Management
Full text linkAchieving a correct and effective management of Fog computing applications is a non-trivial task to accomplish, which includes considering specific application requirements as well as dynamic infrastructure characteristics. CISCO FogDirector is a tool that can be used to manage the entire life-cycle of IoT applications over Fog infrastructures by relying on a RESTful API. In this paper, we present a prototype simulation environment, FogDirSim, compliant with FogDirector API. FogDirSim permits comparing different application management policies according to a set of well-defined performance indicators (viz., uptime, energy consumption, resource usage, type of alerts) and by considering probabilistic variations of the applications workload and failures of the underlying infrastructure. A lifelike example is used to validate the prototype and to show its usefulness in selecting the best management policy
The metamorphic units of the eastern side of Monte Leoni (Northern Apennines, Italy)
No full textThis work deals with the stratigraphic and structural setting of the metamorphic succession exposed in the eastern side of the Monte Leoni, the southern extension of the Monticiano-Roccastrada Ridge. In the study area, three main tectonic units crop out, which are, from top to bottom: the Ophiolitic Unit, the Tuscan Nappe and the epimetamorphic Monticiano-Roccastrada Unit. They are unconformably overlain by post-orogenic, Neogene marine and Quaternary continental deposits. The Monticiano-Roccastrada Unit consists of Palaeozoic deposits overlain by the Triassic Verrucano Group, represented by the Civitella Marittima Fm. (Early?-Middle? Triassic), the Anageniti minute Fm. (Late Ladinian) and the Tocchi Fm. (Carnian). The Verrucano Group of the eastern side of Monte Leoni lacks the Monte Quoio Fm., which is extensively exposed in the northern part of the Monticiano-Roccastrada Ridge and pinches out southward being progressively replaced by the Anageniti minute Formation.
The Palaeozoic deposits comprise the Falsacqua Fm., mainly consisting of normally graded metasandstones and metapelites, locally overlain conformably by a decametre-thick horizon of metacarbonates alternating with subordinate metapelites. The whole Palaeozoic succession exposed in the eastern side of Monte Leoni shows stratigraphic and sedimentological features which typically characterise the Farma Fm., considered in the type-area (Farma Valley, in the central part of the Monticiano-Roccastrada Ridge) as a Moscovian turbiditic deposits. As a consequence these pre-Verrucano deposits represent the southernmost outcrops of the Farma Formation. The Civitella Marittima Fm. unconformably overlies the Palaeozoic deposits and is represented by three members, which are: the basal mainly conglomeratic member, the intermediate mainly arenaceous member and the upper pelitic-arenaceous member. The Civitella Marittima Fm. records a retrogradational fluvial fan setting, possibly represented by coalescing terminal fans. The Anageniti minute Fm. erosionally overlies the fine-grained siliciclastics of the upper member of Civitella Marittima Fm. and consists of finingupwards successions represented by quartzose metaconglomerates, quartzose metasandstones and metapelites. These record ephemeral stream and flood-plain sedimentation, whereas the carbonates and siliciclastic fines of the overlying Tocchi Fm. documents the Carnian marine transgression over such an alluvial plain. In the Monte Leoni the Verrucano Group is formed by two sedimentary cycles. The lower one, stratigraphically corresponding to the lower sedimentary cycle of the Punta Bianca area (La Spezia), is represented by the Civitella Marittima Fm., whereas the upper cycle, comprising the Anageniti minute Fm. and the Tocchi Fm., is referable to the Verrucano succession (Verruca Fm. and Monte Serra Fm.) of the Monti Pisani. Four deformational events (D1, D2, D3 and D4) related to the Northern Apennines tectonic evolution affected the metamorphic units. D1 is represented by meso- to map-scale south- and east-verging F1 folds, with associated penetrative S1 axial planar tectonic foliation. S1 consists of a pervasive schistosity, particularly well developed in the metapelites, ranging from parallel to strongly inclined with respect to the bedding (S0). D2 is represented by asymmetric east-verging folds (F2), characterised by overturned to vertical shorter limbs. The F2 are typified by NE-SW striking axes and subhorizontal to gently NW/SE dipping axial surfaces. A penetrative, axial-planar tectonic foliation (S2) occurs in the metapelites. D3 is represented by map-scale gentle folds (F3) and by disjunctive and widely spaced S3 tectonic foliation. Finally, high-angle normal faults (D4) dissect all the previous structures
Sezione 309010, Foglio 309 Montepulciano, Carta Geologica Regionale, Scala 1:10.000, Regione Toscana
No full textMetadati Carta Geologica Regione Toscana scala 1:10.000. http://159.213.57.103/geoweb/listmet/lista_metadati_10k.ht
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