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.
Source Baker, V. R. (1978). “The Spokane Flood Controversy and the Martian Outflow Channels.” Science, 202(4374), 1249-1256.