| Domain | Definition | ||
| Mining | Sw. A dense, compact, metamorphic rock consisting of microscopic quartz and feldspar crystals, with occasional phenocrysts and sometimes hornblende, chlorite, magnetite, and hematite. It is associated with gneisses, but is of obscure origin. See also: porcellanite. (references) | ||
Source: compiled by the editor from various references; see credits. | Top | ||
