Devensien ; Dépôt de pente ; Géographie physique ; Pléistocène supérieur ; Périglaciaire ; Quaternaire zones moyennes ; Royaume-Uni ; Versant ; Wales
Three sorts of slope deposits are frequently observed in Wales. Their nature is closely reated to the bedrock: stratified screes and grèzes litées on shales and mudstones, massive block screes and slope deposits on orthoquartzites, solifluction
deposits forming terraces or rolling slopes on greywackes. These formations are evidence for a long period of periglacial activity during the Devensian in Wales.