1,721,328 research outputs found
Holocene variations of the Vedrett della Lobbia, Adamello Group, central Alps(Variazioni Oloceniche della Vedretta della Lobbia, Gruppo dell'Adamello - Alpi centrali)
No full textGeomorphological, glacial geological, lichenometrical and dendrochronological studies have been carried on the Upper Val di Genova with the aim of reconstructing Holocene fluctuations of the Vedretta della Lobbia. The maximum extention reached by the glacier during the Little Ice Age is marked by a moraine near the Malga Matarot bassa, at about 1790 m. The age of this moraine lies between 1645 A.D. and 1845 A.D. The maximum position of the same glacier during the Holocene has been determined at a slightly more advanced point (before 5310 14C yr BP). An end moraine located about 100 m South of the Malga Matarot bassa, at about 1790 m, marks the position reached by the glacier in the second half of the last Century. In the 20th Century, the Vedretta della Lobbia gradually retreated to its present position at about 2570 m. When the galcier was at its maximum position during the Little Ice Age, the snowline was situated about 60 m below the present snowline (2950)
The Adamello-Presanella and Brenta Massifs, Central Alps: Contrasting High-Mountain Landscapes and Landforms
No full textAdamello-Presanella and Brenta massifs are two distinct and adjacent mountain groups divided by an Alpine structural alignment which separates the Southern Alps into two distinct blocks characterized by different rock types. The Adamello-Presanella Massif is made up of intrusive igneous rocks and shows typical landscapes of high-mountain environments modelled prevalently by the action of glaciers. In the Brenta Massif limestones and dolostones crop out extensively which have been shaped into steeples, pinnacles, vertical rock faces and ledges by selective erosion. In this mountain group subsurface and surface karst landscapes have also developed. Owing to its extraordinary interest and geological-geomorphological value, these massifs are included in the European Geoparks Network and in the World Global UNESCO Network of Geoparks
Geomorfologia dell'Alta Val di Genova (Gruppo dell'Adamello) Alpi Centrali
No full textCarta Geomorfologica rappresentante le forme di erosione e di accumulo legate alla morfogenesi glaciale e periglaciale dell'alta val Genov
Lake Garda: An Outstanding Archive of Quaternary Geomorphological Evolution
No full textPleistocene glaciers repeatedly filled the elongated crypto-depression presently hosting Lake Garda, building a complex suite of end moraines at the Alpine foothills and looping out onto the Po Plain. The moraine amphitheatre impounded Lake Garda, the widest Italian lake, and offers a well famous example of glacially originated landscape. The mountain sector of the lake depression deeply enters the alpine border and the complex geological structure strongly conditioned the geomorphological setting of the area. A suite of well-preserved lacustrine relict landforms document the articulated history of the paleo-Lake Garda that developed after the withdrawal of Pleistocene glaciers. Relevant is the connection of landscape features and Quaternary sediments with the archaeological heritage of human frequentation of the area, furnishing a very helpful tool for investigating the paleoclimatic evolution of this region as well as for investigating neotectonic activity
OPEN ACCESS DATA REPOSITORY OF LATE-PLEISTOCENE AND HOLOCENE PALEO-SHORELINES ALONG THE ANTARCTIC PENINSULA AND SOUTH SHETLAND ISLANDS COASTS
No full textZingaro M., Baroni C., Capolongo D., Mastro-nuZZi g., salvatore M.C., sCiCChitano g. & vaCChi M.,Open access data repository of Late-Pleistocene and Holocene paleo-shorelines along the Antarctic Peninsula and South Shetland Islands coasts. (IT ISSN 0391-9838, 2021).An improved understanding of the chronology of Antarctic ice sheet deglaciation since the Last Glacial Maximum (LGM) represents a fundamental tool to better define the origin of past and future meltwa-ter influx in the global oceans. Relict shorelines and other evidence of past Relative Sea Level (RSL) evolution were widely used to understand past ice sheet history and to improve predictions of climate-controlled sea level evolution. In the last decades, RSL data in the Antarctic region have been mostly produced using a wide range of geomorphic evidence such as beach and marine deposits, marine terraces and isolation ba-sins. However, the lack of a geographic common framework that in-cludes data derived from different sources, limits the accessibility to the information. Here we present a new cartographic approach to cre-ate an open access geodatabase of the postglacial paleo-shorelines by using a standard collecting pattern. Cartographic Antarctica Reposito-ry (CAR) includes RSL data along the coasts of the Antarctic Peninsula and South Shetland Islands. Results show the advantages to use CAR for integrating data and supporting spatial analyses, by representing an easy and usable tool for the improvement of shoreline evolution defini-tion and the planning of Antarctic coast investigations. CAR is dynam-ic repository project that will be further expanded on other Antarctic regions too, integrating fully into the wide reference context of the free access Antarctic datasets
Le ricerche archeologiche alla Punta della Mortola (Giardini di Villa Hanbury, Imperia): campagne 1985 e 1987
No full text
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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