Sjoerd van der Meulen (1990) “Major lateral sediment displacement in till-sand-peat associations of the Tjonger Valley fill (the NE Netherlands) - Holocene cryoturbation?”, Netherlands Journal of Geosciences, pp. 341-350. Available at: https://njgjournal.nl/index.php/njg/article/view/12875 (Accessed: 6April2026).