sol 21 OM view of the soil om a magnetic substrait:

Since this was derived from a high compression JPG ( 13.7) with a high contrast( 75% of possible 0-255 brightness range with mean brightness 83 and std 21 ), I appied a non-linear brightness transform to make it easier on the eye -- but you can't believe any of the fine details as "real" -- whatever that means.
Where are the raw OMs?