Protonilus Mensae

from Wikipedia, the free encyclopedia
Region on Mars
Protonilus Mensae
Close up view of a large dune.
Close up view of a large dune.
Protonilus Mensae (Mars)
Protonilus Mensae
position 44 °  N , 49 °  E Coordinates: 44 °  N , 49 °  E
expansion 1034 km
history
Eponym from an albedo feature at 42N, 315W.

Protonilus Mensae is a region on Mars in the Ismenius Lacus - Gradfeld . It lies between Deuteronilus Mensae and Nilosyrtis Mensae , which are all on the border with the Mars dichotomy . The name was adopted by the International Astronomical Union in 1973 .

The surface is described as fretted terrain , containing plateaus, cliffs, and large shallow valleys. They were probably formed by glaciers that produced debris . These glaciers are called lobate debris aprons (LDA) when they include hills or plateaus. If they are in valleys, their designation is Lineated valley fill (LVF). Smaller (younger) bulges on larger (older) bulges show that there was more than one glaciation phase. He suspects that there is a large amount of ice under a thin layer of rock and dust . Radar data from SHARAD (SHAllow RADar on board the MRO ) showed ice under both LDA and LVF.

Web links

Commons : Protonilus Mensae  - collection of images, videos and audio files

Individual evidence

  1. ↑ a b Protonilus Mensae in the Gazetteer of Planetary Nomenclature of the IAU (WGPSN) / USGS
  2. ^ Sharp, R. 1973. Mars Fretted and chaotic terrains. J. Geophys. Res: 78. 4073-4083
  3. ↑ Catalog Page for PIA01502. In: nasa.gov. photojournal.jpl.nasa.gov, accessed March 29, 2017 .
  4. ↑ Baker, M. et al. 2010. Flow patterns of lobate debris aprons and lineated valley fill north of Ismeniae Fossae, Mars: Evidence for extensive mid-latitude glaciation in the Late Amazonian. Icarus: 207, 186-209.
  5. ↑ Morgan, G. and J. Head III. 2009. Sinton crater, Mars: Evidence for impact into a plateau ice field and melting to produce valley networks at the Hesperian-Amazonian boundary. Icarus: 202. 39-59.
  6. ↑ Morgan, G. et al. 2009. Lineated valley fill (LVF) and lobate debris aprons (LDA) in the Deuteronilus Mensae northern dichotomy boundary region, Mars: Constraints on the extent, age, and periodicity of Amazonian glacial events. Icarus: 202. 22-38.
  7. ↑ Plaut, J., A. Safaeinili, J. Holt, R. Phillips, J. Head, J., R. Seu, N. Putzig, A. Frigeri. 2009. Radar evidence for ice in lobate debris aprons in the midnorthern latitudes of Mars. Geophys. Res. Lett. 36. doi : 10.1029 / 2008GL036379 .
  8. ↑ HiRISE | Fretted Terrain Valley Traverse (PSP 009 719 2230) . Hirise.lpl.arizona.edu. Retrieved December 19, 2010.