In mining, usually used to indicate worthless rocks or material covering a valuable vein; in placering, the non-gold bearing sand above bedrock where gold is concentrated
is in GEMIS a part of the solid wastes, characterizing the wastes from extraction of primary energies and raw materials
The surface waste or worthless rock overlying a flat or moderately inclined economic deposit
means material of any nature, consolidated or unconsolidated, that overlies a coal deposit, excluding topsoil
Material of any nature, consolidated or unconsolidated, that overlies a deposit of useful materials, ores, or coal
is the backfill that was used to fill the waste sites at Hanford The overburden is excavated and sampled to determine if it is contaminated Clean overburden soil is used again as backfill Contaminated overburden soil is disposed at the Environmental Restoration Disposal Facility The Remedial Design Report/Remedial Action Work Plan defines the shallow zone as 15 feet below the surface MTCA sets the sampling location for soil cleanup at 15 feet below the surface (Diagram) (BHI 1999) See also shallow zone and deep zone
Sediment or rock that overlies an economically useful deposit and which must be removed prior to mining that deposit
Geologic material of any nature, consolidated or unconsolidated, that overlies a deposit of useful materials As used by the Yucca Mountain Project, this is geologic material overlying the repository block
n: Layer of soil and rock overlying a mineral deposit, removed during surface mining
Layers of earth and rock covering a coal seam In surface mining operations, overburden is removed using large equipment and is either used to backfill areas previously mined or is hauled to external dumping areas
Rock which contains either no gold or gold in quantities that cannot be economically extracted Because such rock either lies on top of ore or is mixed in with the ore, overburden must be mined in advance of or at the same time as the ore is mined
the surface soil that must be moved away to get at coal seams and mineral deposits
The layer of fragmental and unconsolidated material including loose soil, silt, sand and gravel overlying bedrock, which has been either transported from elsewhere or formed in place
Layer of soil, sediment, and rock found over a mineral deposit This material is removed during the process of surface mining
Earth that must be removed to reach a deposit of rock or other material to be quarried
the surface soil that must be moved away to get at coal seams and mineral deposits burden with too much work or responsibility load with excessive weight
to give an organization, person, or system more work or problems than they can deal with