Il contributo della geomorfologia nel rilevamento del Quaternario: l'esempio CARG nel Trentino

Abstract

The conceptual and methodological differences between geological and geomorphoiogical investigations are outlined, as well as the role and possible contributions of geomorphology to the survey of Quaternary deposits. This paper reports on the approach taken while applying geomorphological techniques to the geological mapping of Quaternary deposits in the Province of Trento (N Italy), which were performed for the 1:50,000 scale Geological Map of Italy (CARG project). The procedure of successive approximations, simplifications, detailed studies and improved definitions, which was adopted to pass from a "traditional" Quaternary legend consisting of simplified geomorphological features to the specific legend proposed for the CARG project, is illustrated. The Trento surveys are further discussed through the use of a mapping example. The role played by the Trento Geological Survey in proposing and applying the above-mentioned method is underlined, particularly in regards to the coordination of 1:50,000 scale mapping of alpine Quaternary formations and in the digitising of mappable elements. Finally, some examples of the role of geomorphological investigations in identifying and characterising Quaternary deposits are presented.