1,720,984 research outputs found

    Calabrian Arc oroclinal bending: The role of subduction

    Full text link
    Paleomagnetic data collected in the last 30 years indicate that a simple orocline model is not sufficient to describe the complex evolution of the Calabrian Arc. Present-day curvature of the Calabrian Arc is the result of a different tectonic history between the edges of the arc, namely the Southern Apennines and Sicily, and its core, the Calabria-Peloritani Domain. These differences mirror the structural architecture and deep lithospheric configuration of the Calabrian Arc, which are related to the geometry and evolution of the Ionian subduction system. In particular, the presence of lateral heterogeneities in the subducting lithosphere and the subsequent progressive decrease in width of the trench during subduction are likely the main causes of Calabrian Arc formation and of its present-day narrow tight shap

    Late Quaternary geomorphological evolution of the Adriatic coast reach encompassing the Metauro, Cesano and Misa river mouths (Northern Marche, Italy).

    No full text
    This work has been carried out to gain deeper insights on the late Quaternary geomorphic evolution of the Adriatic costal area encompassing the Metauro, Cesano and Misa river mouths, in the outer sector of the northern Marche Apennines. In addition to detailed geomorphological survey, drilling logs and data from new and previously reported radiocarbon datings, a geostatistical processing of fluvial and marine terrace topography was attempted, which is finalized to reconstruct the original geometry of depositional top-surfaces. The Metauro, Cesano and Misa rivers in their most distal sectors flow orthogonally to the coastline and display wide and flared fluvial plains in the proximity of their mouths. At least four fluvial terrace levels, likely referred to Middle Pleistocene-Holocene glacial-interglacial cycles have been recognized throughout the study area. Fluvial plains generally merged into narrow relict coastal plains interconnecting the river mouths, and coastal fans affected by wave-cut scarps are the main geomorphic features of the coastal area. Close to the river mouths the bulk of geomorphic and geometric/stratigraphic features were consistent for identifying, for the first time, some typical coastal fans with well preserved Holocene wave cut scarps. Further, data indicate that the local convex-up morphology and the geometric assessment of the topography depend upon the fan location rather than tectonics. Finally, by coupling geomorphologic and stratigraphic data with the results of geostatistical analysis, it has been possible to constrain the location of shoreline and sea level during the last Interglacial. Basing on that, it has been calculated that the coastal area underwent a mean uplift rate of at least 0.15 mm yr-1, in fair agreement with previous estimations concerning the northern Marche coastal zone

    River terraces in the Fiume Tronto drainage basin, Marche Region: a contribution to morphotectonic investigations

    No full text
    The aim of this work is to provide a methodological input based on geostatistical topographic analyses for the detection of morphological anomalies induced by neotectonic activity on fluvial terrace surfaces. The study area corresponds to the distal portion of the Fiume Tronto drainage basin (Southern Marche region of Central Italy); the basin developed on Plio-Pleistocene marine terrigenous deposits and its arrangement was strongly influenced by Quaternary uplift and regional WSW-ENE and E-W trending fault zones. Detailed surveys allowed to verify the location of surfaces, at several levels; they are the remnants of Quaternary fluvial terraces, formed in response to both climatic oscillations and regional uplift. Several points at the top of the surfaces were sampled by GPS and then geostatistically processed (Kriging method) to provide an unbiased interpretation of the chronological sequence of terraces. The geometrical setting of the terraces seems strongly influenced by the regional uplift and by the activity of the Tronto major fault. Results of geostatistical analysis, compared to the DTM indicated that minor Quaternary faults dislocated the terraces. This is in agreement with the outcomes of previous works, thus confirming the usefulness of this methodological approach in rhe study of fluvial terraces as neotectonic indicators

    Italy

    No full text
    The two branches of toxicology in Italy, forensic and industrial, developed in parallel, and in 1910 the first Department of Occupational Medicine was opened at the University of Milan by Prof. Luigi Devoto (1864-1936), one of the most highly respected figures in this field. This was followed in 1917 by the creation, at the Pharmacology Institute of the University of Florence, of a Division of Toxicology, which was later directed by the famous pharmaco-toxicologist Mario Aiazzi Mancini (1887-1980). In the present the history of toxicology in Italy is well represented by the activity of the Italian Society of Toxicology. The Italian Society of Toxicology (SITOX, formerly SIT) was founded in Pavia on October 20, 1967. The founding members were Prof. Pietro Mascherpa, Director of the Institute of Pharmacology of the University of Pavia School of Medicine, and Professors Gianmartino Benzi and Francantonio Bertè. The President of the Republic officially recognized the Society on May 16, 1972. It is actively engaged in promoting the value of scientific, professional and regulatory aspects of modern toxicology
    corecore