A full set (upper and lower) of implants and dentures can cost $7,000-$90,000 or more. CostHelper readers report paying $3,800-$27,858 for implants with a single denture plate, at an average cost of $14,226; and $6,549-$80,000 for a full set of implant-supported dentures (upper and lower), for an average expense of $34,119.
overburden-the surface soil that must be moved away to get at coal seams and mineral deposits. land, soil, ground-material in the top layer of the surface of the earth in which plants can grow (especially with reference to its quality or use); the land had never been plowed; good agricultural soil.
The rock that breaks down into mineral fragments that form a soil is called parent rock. Different parent rocks have different chemical compositions. As a result, soils also differ in composition. Bedrock is the layer of rock beneath soil.In some cases, the bedrock is the parent rock. In these cases, the soil remains above the bedrock that weathered to form the soil.Soil that remains above its parent rock is called residual soil.Few soils are residual soils.any people think that soil is just dirt. To a scientist, soil is a loose mixture of small mineral fragments, organic material, water, and air that can support the growth of vegetation. The Source of Soil Because soils are made from weathered rock fragments, not all soils are the same.