Sheetflood deposits formed by subsidiary river channels (crevasse channels) as a result of point failures of a levee (Kargel et al. 1994).
Fan- or lobe-shaped mounds of sediment. Their distal margins can either thin gradually or end abruptly with a steep slope (Bridge and Demicco 2012, p. 432).
Deltaic crevasse splay (subdelta), formed along distributary channels (e.g., Roberts 1986, p. 438).
Crevasse splays form following flooding events (Pondrelli et al. 2008), “where the levee of a river has been breached and flow is fed directly onto the floodplain through a new distributary channel (crevasse channel)” (North and Davidson 2012), infilling the interdistributary areas (floodplain) with coarser sediments, initially unconfined, later concentrating into one or more channels. “The splay will initially be symmetrical about a perpendicular to the main channel, but, as it enlarges, its morphology and orientation adjust to...
- Bridge JS, Demicco R (2012) Rivers, alluvial plains and fans. Earth surface processes, landforms and sediment deposits. Cambridge University Press, New York, In, pp 365–461Google Scholar
- Roberts HH (1986) Selected depositional environments of the Mississippi River deltaic plain. In: Neathery TL (ed) Southeastern section of the Geological Society of America, Centenniel Field Guide 6, Geological Society of America, Boulder, CO. pp 435–446Google Scholar