Metamorphic rock
Videos
Metamorphic rocks arise from the transformation of existing rock to new types of rock in a process called metamorphism. The original rock is subjected to temperatures greater than 150 to 200 °C and, o
Quartzite, a type of metamorphic rock
Metamorphic rock, deformed during the Variscan orogeny, at Vall de Cardós, Lérida, Spain
Amphibolite formed by metamorphism of basalt
Metamorphic rock containing staurolite and almandine garnet
Amphibolite
Videos
Amphibolite is a metamorphic rock that contains amphibole, especially hornblende and actinolite, as well as plagioclase feldspar, but with little or no quartz. It is typically dark-colored and dense,
An amphibolite boulder in the Botanical Gardens of Charles University, Prague, Czech Republic.
Amphibolite from Cape Cod, Massachusetts
Garnet bearing amphibolite from Val di Fleres, Italy
Garnet amphibolite, sold as "Nordic Sunset Granite", reportedly from Murmansk area