Variable features on Mars. VI - an unusual crater streak in Mesogaea

Details Variable features on Mars. VI - an unusual crater streak in Mesogaea Variable features on Mars. VI - an unusual crater streak in Mesogaea

Feb 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976icar...27..241v&link_type=abstract

Icarus, vol. 27, Feb. 1976, p. 241-253.

Astronomy and Astrophysics

Astronomy

5

Craters, Mars Surface, Terrain Analysis, Volcanology, Wind Erosion, Albedo, Astronomical Models, Erosion, Gravels, Mariner 9 Space Probe, Topography

Scientific paper

An unusual prominent dark streak located in Mesogaea (near 8 deg N, 191 deg W) is described. Its appearance is unlike that of most dark streaks on Mars, many of which have ragged outlines, are variable on short time-scales, and are presumed to be erosional. The Mesogaea streak has a tapered smooth outline, and no changes within it were observed. It is suggested that this streak is depositional and that the low-albedo material originated within the associated crater itself. The source area is identified with a compact low-albedo region on the crater floor. Two possible origins for the dark material are suggested:(1) deflation from a recently exposed and relatively unconsolidated subsurface deposit, and (2) production of ash by a volcanic vent.

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