A to Z of words to do with glaciations and glacial landscapes AblationAnglian glaciationAugerBedrockBoulder clayBritish Geological Survey (BGS)Devensian glaciationErraticGlacial depositsGlaciationGravelHeadHummocky moraineIce Age(s)Ice Age Ponds – Kettle-hole pondsLIDARMeltwater channelMoraineMudNunatakOutwashPeat and PeriglacialPermafrostSandSubglacialTill