Redoximorphic features (RMFs) consist of color patterns in a

soil Soil, also commonly referred to as earth or dirt, is a mixture of organic matter, minerals, gases, liquids, and organisms that together support life. Some scientific definitions distinguish ''dirt'' from ''soil'' by restricting the former ...

that are caused by loss (depletion) or gain (concentration) of pigment compared to the

matrix Matrix most commonly refers to: * ''The Matrix'' (franchise), an American media franchise ** '' The Matrix'', a 1999 science-fiction action film ** "The Matrix", a fictional setting, a virtual reality environment, within ''The Matrix'' (franchi ...

color, formed by oxidation/reduction of

iron Iron () is a chemical element with symbol Fe (from la, ferrum) and atomic number 26. It is a metal that belongs to the first transition series and group 8 of the periodic table. It is, by mass, the most common element on Earth, right in ...

and/or

manganese Manganese is a chemical element with the symbol Mn and atomic number 25. It is a hard, brittle, silvery metal, often found in minerals in combination with iron. Manganese is a transition metal with a multifaceted array of industrial alloy u ...

coupled with their removal, translocation, or accrual; or a soil matrix color controlled by the presence of iron (2+) The composition and responsible formation processes for a

soil color Soil color does not affect the behavior and use of soil; however, it can indicate the composition of the soil and give clues to the conditions that the soil is subjected to.Brady, Nyle C. & Ray R. Weil ''Elements of the Nature and Properties of ...

or color pattern must be known or inferred before it can be described as an RMF.

References

{{reflist Soil