Ana Margarida G. Ferreira

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Mantle plumes are thought to play a key role in transferring heat from the core-mantle boundary to the lithosphere, where it can significantly influence plate tectonics. On impinging on the lithosphere at spreading ridges or in intra-plate settings, mantle plumes may generate hotspots, large igneous provinces and hence considerable dynamic topography.(More)
This paper present an analysis, based on Charles Sanders Pierce semiotic, of impress environmental communication used by auto-motive companies from Brazil and Europe to achieve the "green market". The aim is to analyze the implicit structure of adverti-sements, the ecological appeals used in and how depth the eco-logical subject is presented by company.(More)
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