| Domain | Definition | ||
| Energy | The unexcavated face of exposed over-burden and coal in a surface mine. (references) | ||
| Physics | Unexcavated face of exposed overburden and coal or other mineral in a surface mine or in a face or bank on the uphill side of a contour mine excavation. (references) | ||
Source: compiled by the editor from various references; see credits. | Top | ||
