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- sierradetecka @fieldwork:sierradetecka #Argentina #Jurassic #Paleozoic #Patagonia #Sierra de Tecka #fieldwork #laccolith #mapping
- - A Brief Geographical Outline ===== The South American continent can be geographically subdivided in se... ogical overview ====== The geology of the South American continent is characterised by two contrasting ma... ontinent and the cratonic region of eastern South America. {{media/image4.jpeg?615x480}}The Andean mountai... ubduction. In contrast, the eastern part of South America is a tectonically passive cratonic region build u