The Mangala Valles and Mangala Fossa
The Mangala Valles are a complex system of criss-crossing channels on Mars, located in the Tharsis region and in the Memnonia quadrangle. They originated in the Hesperian and Amazonian epochs. They are thought to be an outflow channel system, carved by catastrophic floods, and the release of vast quantities of water across the Martian surface. This flooding was probably initiated by tectonic stretching and the formation of a graben, Mangala Fossa, at the channels' head, perhaps breaching a pressurized aquifer trapped beneath a thick "cryosphere" (layer of frozen ground) beneath the surface. The Mangala Valles contain several basins; after they filled, the overflow went through a series of spillways. One source of waters for the system was the Memonia Fossae, but water also probably came from a large basin centered at 40 degrees S.
A recent study that used photogeologic analysis, geomorphic surface mapping, cratering statistics, and relative stratigraphy, demonstrated that the Mangala Valles were flooded by water at least twice and covered with lava at least three times during the Late Amazonian. The presence of scoured bedrock at the base of the mapped stratigraphy, together with evidence from crater retention ages, suggests that fluvial activity came before lava flows. These alternating periods of aqueous flooding and volcanism are similar to that of other outflow systems on Mars, such as Ravi Vallis and the Kasei Valles.
A streamlined island within the Mangala Valles, as seen by THEMIS.
Streamlined feature in the Mangala Valles, as seen by HiRISE under the HiWish program. Many dark slope streaks are visible. Location is Memnonia quadrangle.
Part of the Mangala Valles, as seen by HiRISE under the HiWish program. Location is Memnonia quadrangle.
- The Mangala Valles are referred to in Michael Crichton's book Sphere.
- In Stephen Baxter's novel Voyage, they are the location of the first crewed Mars landing.
- They are mentioned in Terry Pratchett's and Stephen Baxter's novel The Long Mars.
- They are also the location of the first crewed Mars base in Codex Regius (1999). Horsemen of Mars. ISBN 978-1499274578.
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- Hanna, J. and R. Phillips. 2005. Tectonic pressurization of aquifers in the formation of Mangala and Athabasca Valles on Mars. LPSC XXXVI. Abstract 2261.
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- Leask, Harald J.; Wilson, Lionel; Mitchell, Karl L. (24 February 2007). "Formation of Mangala Fossa, the source of the Mangala Valles, Mars: Morphological development as a result of volcano-cryosphere interactions". Journal of Geophysical Research 112 (E02011): E02011. doi:10.1029/2005JE002644. Bibcode: 2007JGRE..112.2011L. https://eprints.lancs.ac.uk/id/eprint/31116/1/2005JE002644.pdf.
- Leask, Harald J.; Wilson, Lionel; Mitchell, Karl L. (4 August 2007). "Formation of Mangala Valles outflow channel, Mars: Morphological development and water discharge and duration estimates". Journal of Geophysical Research 112 (E08003): E08003. doi:10.1029/2006JE002851. Bibcode: 2007JGRE..112.8003L. https://eprints.lancs.ac.uk/id/eprint/31123/1/2006JE002851.pdf.
- Cabrol, N. and E. Grin (eds.). 2010. Lakes on Mars. Elsevier. NY.
- Emrick, C. and R. De Hon. 1999. Flood discharge through Labou Vallis, Mars. Lunar Planet. Sci. Conf. XXX: Abstract #1893.
- Zimbelman, J. et al. 1992. Volatile history of Mangala Valles, Mars. Journal of Geophysical Research 97: 18309-18317
- De Hon, R. 1994. Lacustrine sedimentation in lower Mangals Valles. Mars Lunar Planet. Sci. Conf. XXVII: 295-296
- Keske, Amber L.; Hamilton, Christopher W.; McEwen, Alfred S.; Daubar, Ingrid J. (2015). "Episodes of fluvial and volcanic activity in Mangala Valles, Mars". Icarus 245: 333–347. doi:10.1016/j.icarus.2014.09.040. PMID 29176911. Bibcode: 2015Icar..245..333K.
- Leask, Harald J.; Wilson, Lionel; Mitchell, Karl L. (13 June 2006). "Formation of Ravi Vallis outflow channel, Mars: Morphological development, water discharge, and duration estimates". Journal of Geophysical Research 111 (E8): E08070. doi:10.1029/2005JE002550. Bibcode: 2006JGRE..111.8070L. https://eprints.lancs.ac.uk/id/eprint/8797/1/jgre2068.pdf.
- "Catalog Page for PIA03827". Photojournal.jpl.nasa.gov. http://photojournal.jpl.nasa.gov/catalog/PIA03827.
- "The Planet Mars: A History of Observation and Discovery". Uapress.arizona.edu. http://www.uapress.arizona.edu/onlinebks/mars/chap12.htm.
Original source: https://en.wikipedia.org/wiki/Mangala Valles. Read more