Encyclopedia of Planetary Landforms

2015 Edition
| Editors: Henrik Hargitai, Ákos Kereszturi

Subaqueous Fan

Reference work entry
DOI: https://doi.org/10.1007/978-1-4614-3134-3_591

Definition

Densely channelized distributary systems fed by turbidity currents flowing down underwater channels (Metz et al. 2009).

Synonyms

Morphometry

Modern terrestrial examples are up to several tens of km wide and over 1,000 m deep (Nichols 2009, p. 251 and references therein).

Formation

Submarine fans form by sediment transportation from rivers in the form of turbidity flows (Nichols 2009, p. 252).

Surface/Structural Units

(Nichols 2009, p. 251)

  1. (1)

    Submarine fan channels that may have levees associated with them. They may incise into or pass distally into depositional lobes.

     
  2. (2)

    Depositional lobes: slightly convex, broad sediment bodies formed at the distal end of channels where turbidity currents spread out. One individual lobe may represent multiple events of deposition. This progradation continues until channel avulses.

     
  3. (3)

    Submarine channel levee, formed in the distal part of the channel, where fine-grained turbidity flow may spill out...

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References

  1. Dromart G, Quantin C, Broucke O (2007) Stratigraphic architectures spotted in southern Melas Chasma, Valles Marineris, Mars. Geology 35:343–366CrossRefGoogle Scholar
  2. Flood RD, Manley PL, Kowsmann RO, Appi CA, Pirmez C (1991) Seismic facies and late Quaternary growth of Amazon submarine fan. In: Weimer P, Link MH (eds) Seismic facies and sedimentary processes of modern and ancient submarine fans. Springer, New York, pp 415–433CrossRefGoogle Scholar
  3. Metz JM, Grotzinger JP, Mohrig D, Milliken R, Prather B, Pirmez C, McEwen AS, Weitz CM (2009) Sublacustrine depositional fans in southwest Melas Chasma. J Geophys Res 114:E10002. doi:10.1029/2009JE003365CrossRefGoogle Scholar
  4. Nichols G (2009) Sedimentology and stratigraphy, 2nd edn. Wiley-Blackwell, ChichesterGoogle Scholar
  5. Quantin C, Allemand P, Mangold N, Dromart G, Delacourt C (2005) Fluvial and lacustrine activity on layered deposits in Melas Chasma, Valles Marineris, Mars. J Geophys Res 110:E12S19. doi:10.1029/2005JE002440Google Scholar
  6. Weitz CM, Parker TJ, Bulmer MH, Anderson FS, Grant JA (2003) Geology of the Melas Chasma landing site for the Mars Exploration Rover mission. J Geophys Res 108(E12):8082. doi:10.1029/2002JE002022CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media New York 2015

Authors and Affiliations

  1. 1.NASA Ames Research Center/NPPMoffett FieldUSA