A sheet, or gently sloping fan, of outwash sands and gravels (pl. sandar); see Marren (2004) Sed. Geol. 164, 3–4, and Magilligan (2002) Geomorph. 44, 1. Sandar fans are commonly found in glacial troughs (Thomas and Chiverrell (2006) Quat. Sci. Revs 25, 21–2).