Periglacial polygonal structures and sand wedges in the late precambrian glacial formations of the taoudeni basin in Adrar of Mauretania (West Africa)
Abstract Large-scale polygonal structures and sand wedges are found over a large area on top of Late Precambrian continental glacial deposits. The exceptionally good preservation of the structures allows comparison with modern periglacial frost wedges filled by wind-transported clastic material in a permafrost environment.