The Atlas of the marine and transitional terraces in the Strait of Magellan is presented. The maps refer to sheets 35, 50, 53, 67, 68, 69, 70, 84, 86, 101, 103 of the Chilean IGM, and were made by using the preliminary cartography by Empresa Nacional de Petroleo (ENAP) and the Chilean IGM, aerial photos by Servicio Aerofotogrammetrico Fuerza Aerea de Chile (SAF) and TM and MSS Landsat satellite images. The Atlas provides a zonation of the area distribution of the most significative deposits processes and forms relating to the coastal belt between Punta Dungeness and Cabo Froward. Morphogenesis of the area was strictly controlled by the processes associated with the advance and retreat of the Magellano Glacier and, subordinately, by the main morphodynamic event represented by post deglaciation marine ingression. The Holocene paleogeographic evolutionary picture of the Patagonia-Tierra del Fuego area is mainly controlled by the imposing phenomenon of glacio-isostasy, though it cannot be ruled out that the morphogenesis subsequent to deglaciation may have been affected by mild neo-tectonic movements, evidence. As previously observed, relative marine ingressions that produced terracing of the coasts and backland presumably depend on prevalently positive movements of the whole coastal system, related to the final deglaciation of the region. It is deduced that parallelly following deglaciation, a strong parallel uplift of the m.m. level was produced with initally transgressive stratigraphic effects. Isostatic rebound, that probably occurred rather late compared to post-glacial transgression, is superimposed with very complex and articulate phenomena, that are under study at present and will be the subject of future works.
Atlas of the Eastern Straits of Magellan coasts - Patagonia and Tierra del Fuego – Chile - 9/12 Maps
DEMURO, SANDRO;
2004-01-01
Abstract
The Atlas of the marine and transitional terraces in the Strait of Magellan is presented. The maps refer to sheets 35, 50, 53, 67, 68, 69, 70, 84, 86, 101, 103 of the Chilean IGM, and were made by using the preliminary cartography by Empresa Nacional de Petroleo (ENAP) and the Chilean IGM, aerial photos by Servicio Aerofotogrammetrico Fuerza Aerea de Chile (SAF) and TM and MSS Landsat satellite images. The Atlas provides a zonation of the area distribution of the most significative deposits processes and forms relating to the coastal belt between Punta Dungeness and Cabo Froward. Morphogenesis of the area was strictly controlled by the processes associated with the advance and retreat of the Magellano Glacier and, subordinately, by the main morphodynamic event represented by post deglaciation marine ingression. The Holocene paleogeographic evolutionary picture of the Patagonia-Tierra del Fuego area is mainly controlled by the imposing phenomenon of glacio-isostasy, though it cannot be ruled out that the morphogenesis subsequent to deglaciation may have been affected by mild neo-tectonic movements, evidence. As previously observed, relative marine ingressions that produced terracing of the coasts and backland presumably depend on prevalently positive movements of the whole coastal system, related to the final deglaciation of the region. It is deduced that parallelly following deglaciation, a strong parallel uplift of the m.m. level was produced with initally transgressive stratigraphic effects. Isostatic rebound, that probably occurred rather late compared to post-glacial transgression, is superimposed with very complex and articulate phenomena, that are under study at present and will be the subject of future works.
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