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One, sometimes spectacular, form is superficially similar to [[waterfall]]s and may be found under dry, desert conditions or in submarine conditions. The sand either falls vertically over suitable drops or cascades down hard slopes. The process has been described as "dry sandflows cascading down the escarpment face, where the grain concentration decreases dramatically and the streaming component of stress greatly exceeds the collisional component" <ref>Turner, Brian R. and Issa Makhlouf (2002) Recent colluvial sedimentation in Jordan: fans evolving into sand ramps, Sedimentology Volume 49, Issue 6, December, Pages: 1283–1298</ref>
Sandfalls are found in sandstone canyons such as [[Antelope Canyon]].{{citation needed|date=March 2013}} A similar process occurs in submarine environments driven by water currents and gravity. Sandfalls on a large scale occur off the southern tip of the island of [[Mauritius]], where strong ocean currents move sand from the high coastal shelf over the edge and into the [[abyssal depth]]s.<ref>{{Cite web|url=http://scienceblogs.com/startswithabang/2013/09/22/weekend-diversion-an-underwater-waterfall/|title=Weekend Diversion: An Underwater Waterfall? | ScienceBlogs}}</ref> Sandfalls in the submarine [[San Lucas Canyon]] off [[Cabo San Lucas]], [[Baja California]] were dived by [[Jacques Cousteau]]. Carter (1975) argues that the ubiquity of this process is evident from the examples from the sides of [[submarine canyons]] documented by [[Robert F. Dill|Dill]] (1964) and from [[seamount]]s and [[deep-sea trenches]] documented by [[Bruce C. Heezen|Heezen]] and Holhster (1971).<ref>Dill, Robert F. (1964) ''Features in the Heads of Submarine Canyons: Narrative of Underwater Film'' pp. 101-104 in: L. M. J. U. Van Straaten (Editor), ''Deltaic and Shallow Marine Deposits,'' Elsevier Science {{ISBN|978-0444533128}}</ref><ref>''Ocean Industry'', Vol. 6 No. 4 1971</ref><ref>Foster, Jeanette (1995) Changes at the Cape, ''Sports Diver'', November/December pp. 60-65.</ref><ref>Editor (1971) Information from abroad. ''Mahasagar'' (bulletin of the National Institute of Oceanography, Goa, India), Volume 4, Jan. See p43-44 (Available at: [http://www.ijs.nio.org/index.php/msagar/article/view/1237]). (Date accessed: 29 Mar. 2013)</ref><ref>Brusca, R. C., Findley, L. T., Hastings, P. A., Hendrickx, M. E., Cosio, J. T., & van der Heiden, A. M. (2005). Macrofaunal diversity in the Gulf of California. Biodiversity, ecosystems, and conservation in Northern Mexico, 179.</ref><ref>Carter, R.M. (1975) A Discussion and Classification of Subaqueous Mass-Transport with Particular Application to Grain Flow, Slurry-Flow, and Fluxoturbidites, ''Earth-Science Reviews'', 11, 145-177</ref><ref>Heezen, B C and Holhster, C D, (1971) ''The face of the deep'', Oxford University Press,
New York, N Y, 659 pp</ref>
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==External links==
*[https://www.youtube.com/watch?v=KRectw-62U0 sand falls have u seen that before ??????
*[https://www.youtube.com/watch?v=BtM6sfNWvt0 Sand Falls Cabo San Lucas
*[http://www.betterphoto.com/gallery/big.asp?photoid=6681669&catid=&style=&rownumber=17&memberid=155548 Sand Falls
[[Category:Geological processes]]
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