By Juan Federico Ponce
This ebook is the results of ten years’ of clinical examine conducted via the authors on Isla de los Estados. The learn comprises their doctoral thesis and plenty of released clinical papers with regards to the island.
The publication is split into vital elements. the 1st half covers various social and usual facets of this distant island and comprises chapters at the clinical and old historical past, physiography with topographical and hydrographical descriptions, weather and oceanographic stream, plants and geology (including stratigraphy, structural geology and geological history).
The moment half includes a reconstruction of the paleoenvironmental, paleoclimatic and paleogeographic background of the island from the final Glacial greatest to the current, correlating with different paleoecological files from the southern a part of Isla Grande de Tierra del Fuego and Patagonia. This moment half additionally incorporates a geomorphological bankruptcy with a characterization of the crucial erosive glacial landforms on Isla de los Estados developed via morphometric research, inventories, maps, paleogeographic and glacial types, and a paleoecological bankruptcy comparing the palaeoenvironment and palaeoclimatic stipulations that prevailed throughout the past due Pleistocene-Holocene instances in accordance with pollen and diatom research from 3 14C-dated peat bathrooms and lakes. ultimately, the e-book concludes with a evaluate of the island’s archaeology and the connection among the palaeoenvironmental background and human profession of this island.
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Additional resources for Climatic and Environmental History of Isla de los Estados, Argentina
In the damp open spaces the presence of Gunnera magellanica, Ranunculus biternatus and Senecio acanthifolius is observed. 4). Although it is basically a lowland formation it can extend even into the sub-alpine zone and to the hilltops, particularly throughout the open boggy areas that are wet and sheltered. 6 Alpine Formation The alpine areas are generally located around 450 m elevation with a lower limit locally modified by edaphic factors and factors of exposure. 5). The characteristic vegetation consists of caespitose or creeping plants.
4 Geological History The oldest geological event registered on Isla de los Estados is volcanic in character and was produced in the middle and upper parts of the Jurassic period (Caminos and Nullo 1979). This volcanic event consisted of the emission of great volumes of tuffs, acidic, calc-alkaline, rhyolitic and rhyodacitic lavas that accumulated in thicknesses several thousands of metres. During this period the landscape consisted of small islands and volcanoes that emitted large volumes of lava and ash.
Wooded passages. b. Nothofagus betuloides forest. San Juan del Salvamento (Photo: J. F. 11 Rocky Promontories These are outcrops of rocks that make up the hillsides exposed to the strong winds. In these environments the ecological conditions are extremely hard and consequently there is almost zero major vegetation. Only lichens appear on the higher parts, above the limit of the stunted forest. In the cracks some gramineae grow as well as Berberis buxifolia. In more exposed places cushions formed by Bolax gumífera and Nassauvia pygmaea are observed along with patches of Drapetes muscosus.
Climatic and Environmental History of Isla de los Estados, Argentina by Juan Federico Ponce