Epidiorite is a family of rocks consisting of metamorphosed forms of gabbro or diabase in which the original clinopyroxene (most often augite) has been replaced by the fibrous amphibole uralite. Epidiorites are generally homogenous but may include schists. Sedimentary, volcanic, plutonic, metamorphic rock types of North America. ... Metamorphic rock is the result of the transformation of a pre-existing rock type, the protolith, in a process called metamorphism, which means change in form, derived from the Greek words meta, change, and morphe, form. The protolith is subjected to extreme heat (>150 degrees Celsius) and pressure causing profound... Categories: Mineral stubs | Igneous rocks ... Diabase is a mafic, holocrystalline, igneous rock equivalent to volcanic basalt or plutonic gabbro. ... Augite Categories: Mineral stubs | Minerals | Silicate minerals ... Amphibole (Hornblende) Amphibole defines an important group of dark-colored rock-forming inosilicate minerals composed of double chain SiO4 tetrahedra linked at the vertices and generally containing ions of iron and/ or magnesium in their structures. ... Categories: Mineral stubs | Metamorphic rocks ...

See also

• epidiabase