Abstract
Results of a study of various Andean sedimentary basins that are distinct in terms of age and geodynamic position allow us to postulate the idea of a compressional tectonic continuum as opposed to the short tectonic events which have, so far, been considered as one of the main features of the dynamic evolution of the Andean belt. In these basins, the development of kilometre-scale synsedimentary folded structures implies the existence of compressional stress over a period of several million years. The existence of tectonic events of long duration allows us to modify the interpretation of the classic Andean tectonic model. The timing of the continuum tectonism is perhaps dependent on the variation in the convergence rate between the Farallon-Nazca and South American plates.
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