Find a term from the labs, understand the process behind it, and see how it appears in the landscape. Each entry connects an explanation with a real observation and a model you can explore.
Term
Gley
Soil features associated with prolonged saturation and oxygen shortage, often including grey colours and rusty mottles from changes in iron chemistry.
What to look for
Real clay samples showing contrasting redox conditions. Prolonged saturation restricts oxygen, often producing grey gley colours; oxidation can produce reddish mottles.
