Sedimentary deposits in the northern lowland plains, Mars

Details Sedimentary deposits in the northern lowland plains, Mars Sedimentary deposits in the northern lowland plains, Mars

Nov 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986jgr....91..166l&link_type=abstract

(Lunar and Planetary Institute, NASA, AAS, et al., Lunar and Planetary Science Conference, 17th, Houston, TX, Mar. 17-21, 1986)

Physics

84

Mars Surface, Plains, Planetary Evolution, Sediment Transport, Fractography, Mars Photographs

Scientific paper

The lowland plains on Mars have surfaces marked by large polygonal fracture patterns. It was recently proposed that the fracture patterns were developed on sedimentary deposits from outflow channels. The authors support this hypothesis because of the following observations. (1) Polygonal fracture patterns tend to occur in low areas on Mars that apparently received influx of sediments; the area of northern plains, in which the fractures occur, also forms a regional low. (2) The fracture patterns are concentrated near reentrants of the plains projecting into the southern highlands. (3) Sinuous ridges at the mouths of Martian outflow channels resemble ridges in Antarctic ice streams and ice shelves; the similarity suggests that the Martian material was transported from the southern highlands toward the northern plains. Overall, it appears that a massive transfer of material took place midway in Martian history, either through the outflow channels or elsewhere along the northern highland scarp, and that this material probably formed the deposits now characterized by polygonal fracture patterns.

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