Distribution of the marine and transitional terraces (Holocene) and geomorphological map of the coastal area of Península Juan Mazía, Tierra del Fuego, Straits of Magellan, Chile (1:50,000 scale map – Map n° 2/12 - Second Edition)

• Main Authors: DEMURO, SANDRO, Di Grande A, Brambati A.
• Other Authors: Demuro, Sandro, Di Grande, A, Brambati, A.
• Format: Other/Unknown Material
• Language: English; Italian
• Published: UNIVERSITA' DEGLI STUDI DI CAGLIARI 2004
• Subjects: Coastal Geomorphology; Magellan Strait; Holocene; bahía Inútil; Holo; Inútil; Pacific; Antartide; Tierra del Fuego
• Online Access: http://hdl.handle.net/11584/34661

Previous studies, carried out by the “Dipartimento di Scienze Geologiche, Ambientali e Marine” of the “Università di Trieste”, within the "Programma Nazionale di Ricerche in Antartide" (P.N.R.A.) and by the "Dipartimento di Scienze della Terra" of the "Università di Cagliari" within the cooperation project PVS - Regione Autonoma della Sardegna - Chile 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 sedimentological studies of the bottom, but were limited to research on the source and transport of the sediments as well as a regional definition of morphostructural units. Subsequent research along the coastal belt was carried out in greater detail with mapping of morphological units. During this second phase, greater attention was given to the study of palaeo-shorelines and different terrace orders of presumed marine and transitional origin (Brambati et alii, 1993a, 1993b). On the basis of the initial geomorphological, geological and sedimentological results obtained, we made a zoning of the coastal belts along the Atlantic opening of the Straits which enabled us to print three sheets on a scale of 1:200,000 (De Muro et alii 1995, Brambati et alii 1995a and 1995b, Di Grande et alii 1995). Detailed studies and maps (scale 1:50,000) of the terraced sequences linked to Holo-Pleistocene glacio-eustatic variations are in course on the area between Punta Dungeness and Bahía Inútil (Di Grande et alii 1996a, 1996b, 1996c; De Muro et alii 1996 and 1996b). The Península Juan Mazía is situated on the Segunda Angostura and since the lower Holocene it has been an important morphodynamic unit in the history of the Straits of Magellan. Its recent evolution can be easily ...