DISTRIBUTION OF THE MARINE AND TRANSITIONAL TERRACES (HOLOCENE) AND GEOMORPHOLOGICAL MAP OF THE COASTAL AREA BETWEEN BAHÍA SAN FELIPE AND PASO ANCHO STRAITS OF MAGELLAN - CHILE (1:200.000 Scale Map) MAP B - - Second Edition

• Main Authors: Brambati A, Di Grande A., DEMURO, SANDRO
• Other Authors: Brambati, A, Demuro, Sandro, Di Grande, A.
• Format: Other/Unknown Material
• Language: English; Italian
• Published: UNIVERSITA' DEGLI STUDI DI CAGLIARI 2004
• Subjects: Magellan Strait; Coastal Cartography; Holocene; Pacific; Magallanes; Estrecho; San Felipe; Ancho; Paso Ancho; Antartide
• Online Access: http://hdl.handle.net/11584/29709

The results of the geological survey on the marine and transitional terraces of the coastal belt within the Straits of Magellan (Estrecho de Magallanes) between Bahía San Felipe and Paso Ancho are reported. The information is mainly from the mapping and field sampling carried out during the 1991, 1994 and 2003 Italian expeditions which were organized by the “Dipartimento di Scienze Geologiche, Ambientali e Marine” of the “Università di Trieste”, within the P.N.R.A. (Programma Nazionale di Ricerche in Antartide) - Magellan Project (Coordinator: Antonio Brambati) and by the "Dipartimento di Scienze della Terra" of the "Università di Cagliari" within the cooperation project PVS - Regione Autonoma della Sardegna - Chile (Coordinator: Sandro DeMuro). Previous studies, carried out on the Straits of Magellan were mainly directed at sedimentological research on the sea bottoms and coastal belt of the eastern section (Atlantic opening). Similar wide ranging research was carried out also on the coastal belt of the western section of the Straits (Pacific opening) from seavessels, since it was inaccessible by land which is typically sheer (fiords). The first coastal studies were connected with the sedimentological analysis of the bottom, but were limited to research on the source and transport of the sediments as well as a regional definition of vast morphostructural units. Subsequent research was carried out in greater detail with mapping of morphological units in the coastal belt (collection of morphostructural, stratigraphic, micropaleontological and sedimentological data, study of active cliffs, palaeo-cliffs, littoral dynamics, dunes, etc.). During this second phase, greater attention was given to the study of palaeo-shorelines and different terrace orders of presumed marine origin. On the basis of the initial geological, sedimentological and geomorphological results obtained, we made a zoning of the coastal belts along the Atlantic opening of the Straits. The map shows the distribution of the youngest terraces ...