Item talk:Q158195
From geokb
Mindat Description
Rock formed by geological modification of pre-existing rocks outside the realm of igneous and sedimentary processes.
Geoscience Ontology Description
Rock formed by geological modification of pre-existing rocks outside the realm of igneous and sedimentary processes. Includes rocks formed by impact metamorphism, standard dynamothermal metamorphism, brittle deformation, weathering, metasomatism and hydrothermal alteration (diagenesis is a sedimentary process in this context).
