Mawrth Site in Context
Addendum to Edgett 30 June 2010 Presentation
Some Additional “Further Work” that could be done (see p. 30 of Edgett presentation)
 Are there correlations between mapped occurrences of different clay minerals (and other minerals) from
CRISM, THEMIS, etc., and remnant patches of Oyama ejecta and/or the rock damaged or covered by
Oyama’s ejecta blanket? This needs to be examined and considered. Is Oyama ejecta present in the walls
of some of the smaller craters people have examined for mineralogy in/near the candidate landing site?
 Oyama is ~107 km in diameter; Radau, also located in western Arabia, is ~115 km in diameter. Radau is
considerably more youthful, retaining its continuous ejecta deposit, raised rim, and secondary crater
chains. See sketch below where I have done a quick-n-dirty sketch map of Radau continuous ejecta
blanket and secondary
chains, then superimposed
this at Oyama to show
roughly what Oyama’s ejecta
extent might have once
looked like. This should be
considered in more detail,
documenting what Oyama
might have once been like,
how much ejecta/debris
might have been present,
how much has been
removed, how much have
the raised rims been
OYAMA (~107 km diam)
RADAU (~115 km diam)
lowered, etc.
The photomosaics are from Viking MDIM 2. The Oyama map was expanded to ~108% its original size to match the diameter of Radau.
MSL Science Team Field Site Discussions – Mawrth & Oyama
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MSL Science Team Field Site Discussions – Mawrth & Oyama
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