Outflow channels were first detected on images from the Mariner 9 mission (Baker and Milton 1974). They are the strongest morphological evidence that large amounts of water once flowed on the Martian surface. Characteristic landforms of outflow channels are anastomosing (building a network of streams that both branch out and reconnect) channels, streamlined erosional “islands,” dry cataracts, and scour marks and grooves on the channel floors (Baker 1982). The closest terrestrial analog for outflow channels is the huge complex of anastomosing rock-cut fluvial channels in east-central Washington (USA). This so-called Channeled Scabland was first interpreted by J Harlan Bretz as the result of the catastrophic...
KeywordsErosion Flooding Groundwater Ice Water
References and Further Reading
- Baker VR (1982) The channels of Mars. University of Texas Press, Austin, 198 ppGoogle Scholar
- Bates R, Jackson J (1980) Glossary of geology, 2nd edn. American Geological Institute, Falls Church, Virginia, 677 ppGoogle Scholar
- Neukum G, Basilevsky AT, Kneissl T, Chapman MG, Van Gasselt S, Michael G, Jaumann R, Hoffmann H, Lanz JK (2010) The geologic evolution of Mars: episodicity of resurfacing events and ages from cratering analysis of image data and correlation with radiometric ages of Martian meteorites. Earth Planet Sci Lett 294:204–222ADSCrossRefGoogle Scholar