By Juan Federico Ponce
This ebook is the results of ten years’ of clinical study performed by means of the authors on Isla de los Estados. The learn comprises their doctoral thesis and lots of released clinical papers concerning the island.
The ebook is split into imperative elements. the 1st half covers varied social and common points of this distant island and contains chapters at the clinical and old history, physiography with topographical and hydrographical descriptions, weather and oceanographic flow, crops and geology (including stratigraphy, structural geology and geological history).
The moment half contains a reconstruction of the paleoenvironmental, paleoclimatic and paleogeographic background of the island from the final Glacial greatest to the current, correlating with different paleoecological documents from the southern a part of Isla Grande de Tierra del Fuego and Patagonia. This moment half additionally encompasses a geomorphological bankruptcy with a characterization of the vital erosive glacial landforms on Isla de los Estados developed by way of morphometric research, inventories, maps, paleogeographic and glacial versions, and a paleoecological bankruptcy comparing the palaeoenvironment and palaeoclimatic stipulations that prevailed in the course of the overdue Pleistocene-Holocene occasions according to pollen and diatom research from 3 14C-dated peat toilets and lakes. eventually, the ebook concludes with a assessment of the island’s archaeology and the connection among the palaeoenvironmental historical past and human profession of this island.
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Extra info for Climatic and Environmental History of Isla de los Estados, Argentina
Example text
This kind of landscape was also observed in Lacroix Cove, Franklin Bay (Ponce et al. 2011a), displaying similar characteristics. The dunes show horizons of reddish colour, rusty, associated with old positions of the phreatic level and black layers, with organic material, possibly related to old stabilization surfaces of the dunes. 1), the axis of which describes a large S oriented generally east–west (Caminos and Nullo 1979). 6 A ravine cut in the dunes on the coast of Crossley Bay (Photo: Rabassa 2005) increases from east to west.
Its orientation also coincides with the axis of the main overturned anticline at the east end of the island.
The environment in which they accumulated would have been one of calm, poorly oxygenated waters. The collection of rocks that resulted from this accumulation of sediments of marine origin is called the Beauvoir Formation and they are found in the northwest part of Isla de los Estados and in the Año Nuevo Islands. Towards the middle part of the Cretaceous both geological formations, Lemaire and Beauvoir, were deformed into a large asymmetrical syncline verging towards the Atlantic side of the orogeny (Caminos and Nullo 1979).