Geo 730: September 14, Day 622: Liesegang 4

The final shot of Liesegang rings from this spot is a closer view of yesterday's outcrop. The black spots on older surfaces are manganese oxides. In dispersed forms, these can provide a purple coloration to rocks, but I'm betting most of the reds and oranges composing the rings are the result of iron oxides and hydroxides.

Photo unaltered. June 14, 2014. FlashEarth Location.