What pysical process is responsible for the creation of rift valleys in sub saharan africa?

What are canada’s major boundaries?

Ahis which describe the horizons in a soil profile? check all that apply. horizon a is mineral deficient. bedrock lies below the soil layers. te horizon o forms from organic material, horizon b undergoes the least amount of change. horizon c is least affected by the soil formation process.

Which soil layers comprise the topsoil? o horizon a horizon b horizon c horizon