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One, sometimes spectacular, form is superficially similar to [[waterfall]]s and these can be found under dry, desert conditions or in submarine conditions. The sand either falls vertically over suitable drops or cascades down hard slopes. Sandfalls are found in sandstone canyons such as [[Antelope Canyon]]{{cn|date=March 2013}}, and are driven by wind and gravitational forces. A similar process occurs in submarine environments driven by water currents and gravity. 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,
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The process of sand falling like rain has also been referred to as a ''sandfall''.<ref>Thorarinsson S (1967) The eruptions of Hekla in historical times. In: Einarsson T, Kjartansson G, Thorarinsson S (eds) The eruption of Hekla 1947–48 I. Societas Scientiarum Islandica, Reykjavík, pp 1–177</ref><ref>Liu, Zhao-Ming (2012) The Analysis of Historical Records of Chinese Ancient Dustfall and Sandfall Events, ''Bulletin of the Association for the History of Science'', Vol. No.17 Page(s) 64-71</ref>
==References==
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