Must deposits of parent material occur before soil formation can begin?

Must deposits of parent material occur before soil formation can begin?

• A. True
• B. False
• C. It depends
• D. Not enough information

Answer: (B)

Soil formation begins when the existing parent material starts to weather and interact with water, air, organisms, and organic matter. This can happen in place—whether the material is bedrock that slowly breaks down or loose sediment already sitting where the soil will form. As weathering proceeds, particles become finer, minerals are released, and horizons begin to develop, even without any new material being deposited. Deposition of additional parent material can occur later or elsewhere, but it isn’t a prerequisite for soil formation.

Soil formation begins when the existing parent material starts to weather and interact with water, air, organisms, and organic matter. This can happen in place—whether the material is bedrock that slowly breaks down or loose sediment already sitting where the soil will form. As weathering proceeds, particles become finer, minerals are released, and horizons begin to develop, even without any new material being deposited. Deposition of additional parent material can occur later or elsewhere, but it isn’t a prerequisite for soil formation.