Abstract
High-latitude coasts are composed dominantly by coarse-grained sediments derived from Pleistocene glaciations. These inherited composition led to gravel armouring either of beaches or spits. The expectance for the anthropogenic-induced sea-level rise will be therefore attenuated due to this resistance of gravel beaches to migrate onshore. Several examples from the Patagonian and Fuegian coasts are described and analysed. Armouring, migration and cannibalisation of gravel spits should be considered in order to forecast the evolution of these coasts in relation to sea-level rise.
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