Slickensides in black soil are found in

Solution (By Examveda Team)

Slickenside is a smoothly polished surface caused by frictional movement between rocks along the two sides of a fault. It is a surface of the cracks produced in soils containing a high proportion of swelling clays.
In black soils, slickensides are found in Subsoil, the layer just below the topsoil.