1,721,063 research outputs found
Tectonic evolution of the Central mediterranean area
No full textThe structure of the Mediterranean region is the final result of a sequence of geodynamic events which may be roughly summarized in the following 4 principal stages: 1) rifting and continental break-up of Pangea (Triassic to Early Jurassic); 2) plate divergence and ocean-floor speading in the Tethyan realm (Middle Jurassic to Early Cretaceous); 3) plate convergence and continent-continent collision (Cretaceous to Eocene); 4) progressive consumption of the original European and African continental margins (Eocene to Present).-from Author
Studi di geologia lucana: carta dei terreni della serie calcareo-silico-marnosa e note illustrative
No full textStudi di geologia lucana: la serie calcareo-silico-marnosa e i suoi rapporti con l'Appennino Calcareo
No full textThe Geological map of Sannio and surrounding Areas by Raimondo Selli (scale 1:100.000). A precious collection of still current data.
No full textIn 1962, on the occasion of the congress of the Italian Geological Society on the theme of «The geology of the Apennines» (Rome, 13-14 December 1962), Raimondo Selli presented a work entitled «The tectonic problem of the Southern Apennines» in which the stratigraphic and structural lineaments of a wide and complex area stretching from Southern Abruzzi to Northern Calabria were illustrated in detail. This work was never published and the reason is unknown. At about twenty years from the death of Raimondo Selli a typewritten text of this work, which should have been published in 1964 in the Volume 4 of the Memoirs of the Italian Geological Society, has been discovered. Together with the manuscript, an unpublished geological map at a scale of 1:100,000 entitled «Geological Map of Sannio and Surrounding Areas» was recovered. This map covers a wide area of the Southern Apennines from Southern Abruzzi to Irpinia. We do not know exactly the date of compilation, but from the legend we can suppose a date surely before 1962.
In the unpublished paper «The tectonic problem of the Southern Apennines» Selli modified quite significantly the ideas expressed in the oral presentation of 1962 and in the previous publications on the geology of the Southern Italy (SELLI, 1957, 1962), but there is no trace of this revision in the legend of the «Geological Map of Sannio and Surrounding Areas». Therefore, we have considered it appropriate to make some brief comments on the content of the unpublished work with the aim of enabling a reading of the geological map that respects the ideas arrived at by its author in 1964. A reading of the map without knowing the content of the unpublished paper, in fact, would not enable the reader, even though expert in the geology of Southern Italy, to fully appreciate its value and above all would not do justice to Raimondo Selli’s capacity to recognize and acknowledge geological evidence in conflict with ideas expressed in its previous publications.
On superficial analysis the Geological Map of Sannio and Surrounding Areas could be considered as a document of purely historical value, given that the legend reflects a scheme already surpassed by the same Selli in 1964. In reality, this map is far from obsolete because it is an objective restitution of the geology of the study area not at all influenced by any pre-existing model. The geological map of Selli is therefore an unexplored mine of data still to be fully exploited containing observations that are well worth recovering and studying in the case we wish to realize an efficient update of the geological cartography of the region. Products such as this are increasingly rare today because too often do we see geological maps that derive from models instead of contributing to create them
Calabria and Peloritani: Where did they stay before the Corsica-Sardinia rotation? Boundary conditions, internal geological constraints and first-order open problems
Full text linkVengono discusse due alternative ricostruzioni palinspastiche del Mediterraneo
centrale entrambe riferite all’Oligocene intorno al limite Rupeliano-Chattiano.
In tutte e due le ricostruzioni l’Unita di Stilo è interpretata come una falda di
provenienza europea ed è ricollocata in corrispondenza del margine orientale
della Sardegna. La successione stratigrafica di Longobucco (appartenente all’Unità
della Sila) e la successione stratigrafica dell’Unità Longi-Taormina affiorante nei
Monti Peloritani vengono riferite allo stesso dominio paleogeografico. Questo
dominio è stato ricollocato a nord della catena cretacico-eocenica, in una posizione
adiacente al dominio di Stilo, nella prima ricostruzione e a sud della Catena
cretacico-eocenica nella seconda ricostruzione
The 1627 Gargano earthquake (Southern Italy): Identification and characterization of the causative fault
No full textWe present the results of a study of the subsurface tectonic features of the Basso Molise, Western Gargano and Northern Capitanata regions (Southern Italy) aimed at the identification of the source of the disastrous 1627 Gargano earthquake. In the maximum-damage area of this earthquake we have recognised a normal fault, here called the Apricena Fault, which has been identified as the fault that caused the seismic event. The Apricena Fault, striking WNW-ESE and dipping towards SSW, extends in the subsurface for about 30 kilometres from Serracapriola to Santa Maria di Stignano cutting through the whole Quaternary sequence. Other important tectonic structures trending WNW-ESE recognized in the area belong to an inactive Pleistocene strike-slip-fault system that is linked to the Mattinata Fault and to its offshore continuation in the Gondola-Grifone structural high. The Mattinata Fault and the Gondola-Grifone High form a quite complex structural feature whose kinematic behaviour is still matter of debate in the regional geological literature. NW-SE structural features recognized in the area are extensional faults whose activity was probably related to the late flexure-hinge retreat of the Adria plate margin during the Late Pliocene-Early Pleistocene eastward migration of the thrust belt-foredeep-foreland system
Geology of the Southern Apennines
No full textThis paper aims to provide a concise description of the geology of the Southern Apennines especially useful for readers having scarce familiarity with this complex region. The text is divided into four parts: - Brief introduction to the geology of the Southern Apennines in which the general outlines of the thrust belt-foredeep-foreland system are given together with a general description of the internal structural architecture of the mountain chain; - Summary of the paleogeographic models existing in the geological literature and discussion of the basic criteria used for the palinspastic restoration of the Apennine depositional domains proposed in this paper; - Synthetic description of the Apennine tectonic units and of the Neogene-Quaternary thrust-sheet-top deposits cropping out in the study area and discussion on the available structural and stratigraphic information constraining the time-space reconstruction of the tectonic deformation; - Short illustration of the principal steps describing the kinematic evolution of the thrust belt-foredeep-foreland system from the early Miocene to the end of the early Pleistocene. The enclosed simplified geological-structural map will help the reader to keep in mind without difficulties the key points of the regional framework. Selected references on the single tectonic unit or thrust-sheet-top deposit have been provided at the end of each paragraph, with the aim of assisting the reader who wanted to tackle the Apennine geological problems by navigating through the numerous controversies and internal inconsistencies of the current literature
The geological map of Sannio and surrounding regions by Raimondo Selli (scale 1:100.000). A precious collection of still current data
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