Rocks

Amphibolite, a rock composed in large part or dominantly of minerals of the amphibole institution. The term has been implemented to rocks of both igneous or metamorphic foundation. In igneous rocks, the term hornblendite is greater not unusual and restrictive; hornblende is the maximum not unusual amphibole and is traditional of such rocks.

Migmatite is a type of rock that exhibits both solid-state and partial melting characteristics. It is commonly found in high-temperature metamorphic environments and is...

Pillow lava is a type of basaltic lava that forms underwater, typically in the ocean. It gets its name from the characteristic pillow-like shapes...

Nuummite is a rare and unique metamorphic rock that is prized for its distinctive iridescent play of colors. It is primarily composed of two...

Ignimbrite is an expansion of hardened tuff. Ignimbrites are igneous rocks made up by crystal and rock fragments in a glass-shard groundmass, albeit the original texture of the groundmass is probably obliterated due to high degrees of welding. The term ignimbrite isn't always encouraged by means of the IUGS Subcommission on the Systematics of Igneous Rocks.

Calligraphy Stone, also known as Mariam Stone or Arabic Stone, is a unique type of fossiliferous limestone that features intricate patterns resembling Arabic calligraphy...

Travertine is a type of sedimentary rock that is formed by the precipitation of carbonate minerals from groundwater. It is often found in and...

Trachyte, light-coloured, very fine-grained extrusive igneous rock that is composed chiefly of alkali feldspar with minor amounts of dark-coloured minerals such as biotite, amphibole, or pyroxene. Compositionally, trachyte is the volcanic equivalent of the plutonic (intrusive) rock syenite. Most trachytes show porphyritic texture in which abundant,

Syenite, any of a category of intrusive igneous rocks basically composed of an alkali feldspar and a ferromagnesian mineral. A unique group of alkali syenites is characterized by the presence of a feldspathoid mineral inclusive of nepheline, leucite, cancrinite, or sodalite (see nepheline syenite). Chemically, syenites comprise a slight amount of silica, incredibly big amounts of alkalies, and alumina. The call become first used by Pliny the Elder.

Limestone is a sedimentary rock such as greater than 50% calcium carbonate ( calcite - CaCO three). There are many exceptional kinds of limestone formed thru a ramification of tactics. Limestone may be precipitated from water ( non-clastic, chemical or inorganic limestone), secreted by using marine organisms including algae and coral

Monzonite is a type of igneous rock that falls within the category of intrusive or plutonic rocks. It is primarily composed of minerals such...

Fulgurites are fascinating natural formations created when lightning strikes sand or soil, melting it into glassy tubes or branching structures. The word "fulgurite" originates...