Light-toned deposits contain only a subset of possible sedimentary deposits (Grotzinger and Milliken 2012) on Mars, and their description as a unique class of deposits is based on subjective and sometimes unreliable parameters.
The name “light-toned deposit” is derived from the light-toned appearance of these deposits in processed, contrast-enhanced grayscale images. They are light orange, reddish, or brownish in true color. The name reflects the albedo of LTD relative to their surroundings. The range of surface albedo on Mars is between 0.35 and 0.25 (Grotzinger and Milliken 2012). Quantitative albedo cannot be extracted from MOC images. Viking observations suggest that light-toned units have albedos of >0.22 and...
KeywordsSedimentary Rock Sedimentary Origin Salt Diapirism Aeolian Process Surge Deposit
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