c89a5c28_mical_Sediments_and_Landscapes__1
[0] Fe behavior [2] Different organisms might favor the observed iron behavior in different conditions and settings. [3] Highly oxidizing conditions in dry climates or in microsites would lead to the observed behavior, since these bacteria do not favor highly oxidizing settings. [4] The observed iron behavior is not important to this process. [1] 
Highly oxidizing conditions in dry climates or in microsites would lead to the observed Fe behavior.
Rock Varnish Chapter 8 in Geochemical Sediments and Landscapes
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