Grus is an accumulation of angular, coarse-grained fragments (particles of sand and gravel) resulting from the granular disintegration by the processes of chemical and mechanical weathering of crystalline rocks (most notably granitoids) generally in an arid or semiarid region. Grus sand, when cemented into a sandstone, will form an arkose.
- Robert L. Bates and Julia A. Jackson (editors) (1984). Dictionary of Geological Terms (3rd edition).CS1 maint: uses authors parameter (link)
- Migoń, Piotr; Lidmar-Bergström, Karna (2002). "Deep weathering through time in central and northwestern Europe: problems of dating and interpretation of geological record". Catena. 49: 25–40.