What is another word for boulder clay?
Pronunciation: [bˈə͡ʊldə klˈe͡ɪ] (IPA) 
Boulder clay, also known as till, is a type of sedimentary rock that is composed of fine-grained soils and rocks that are mixed with large boulders. Synonyms for boulder clay include glacial clay, moraine clay, and unstratified drift. Glacial clay is formed by the movement and melting of glaciers and is typically composed of fine-grained silt and clay. Moraine clay is formed when glaciers deposit sediment that has been eroded from the surrounding landscape. Unstratified drift is the term used to describe all types of till deposits, including those formed by glaciers, ice sheets, and ice caps. Regardless of the term used, boulder clay and its synonyms are important geological formations that provide valuable insights into the history and formation of the landscapes they are found in.
