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This is strong evidence that such stone lines are pedogenic, and produced by soil forming processes.
Laterization is a soil forming process that occurs in warm and moist climates under broadleaf evergreen forests.
The soil forming process (pedogenesis) can begin without the aid of biology but is significantly quickened in the presence of biologic reactions.
This layer is little affected by soil forming processes (weathering), and the lack of pedological development is one of the defining attributes.
The uppermost part of the lithosphere that chemically reacts to the atmosphere, hydrosphere and biosphere through the soil forming process is called the pedosphere.
Underclays typically show considerable evidence of having been altered by plant activity and soil forming processes and are either in whole or part buried soils, called paleosols.
It is a mechanism of soil formation distinct from the soil forming process of eluviation, which is the loss of mineral and organic colloids.
The C horizon, which shows little evidence of being affected by soil forming processes (weathering), is close to the surface, and may be at the surface on an eroded drumlin.
How stone lines form, whether geogenically by geologic processes or pedogenically by soil forming processes is invariably a matter of interpretation (see Soil Biomantle).
Detailed studies of these cylindrical structures found that they were created by the formation of ironstone rims around tap roots of pine trees by soil forming processes.
These studies demonstrate that a paleosol, which is either developed in or comprises underclay, largely reflects the effects of plants and other soil forming processes on the underclay while it formed the ground surface prior to being buried by organic sediments.