The term “diluvial” refers to geological processes or deposits associated with the action of large-scale floods or the runoff from melting glaciers, particularly those related to past glacial periods. Diluvial deposits can include large-scale gravel and sand beds, indicating ancient flood events. Understanding diluvial processes is important in reconstructing past climate events and landscape changes.
Reference: Baker, V. R. (1978). “The Spokane Flood Controversy and the Martian Outflow Channels.” Science, 202(4374), 1249-1256.