Intertidal boulder pavements in the northeastern Gulf of Alaska and their geological significance

Striated boulder pavements, consisting of planar concentrations of clasts having striated upper surfaces, are a common feature of glacigenic deposits but their origin is not well understood. Laterally extensive pavements are currently forming in the intertidal zone west of Icy Bay in the Gulf of Alaska. Pavements comprise “armoured” layers of interlocking boulders, one clast thick, that have been eroded from underlying outcrops of Late Cenozoic …