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In feldspar content it is closely related to the diorites and gabbros. It differs from the others of this group mainly by having few or no mafic minerals. The feldspar is usually labradorite, bytownite, or anorthite.

Anorthosite is less common and less widespread than other related igneous rocks, but is found in very large deposits in certain locations. Examples of major occurrences are in the American Southwest, Appalachian Mountains, southeast CanadaCanada historically the Dominion of Canada is the second-largest, and northernmost, country in the world. It is a decentralized federation of 10 provinces and 3 territories, governed as a constitutional monarchy, and formed in 1867 through an act of Confe, across southern ScandinaviaScandinavia is the cultural and historic region of the Scandinavian Peninsula. The Scandinavian countries are Norway, Sweden and Denmark, which mutually recognize each other as parts of Scandinavia. The collective label "Scandinavia" reflects the cultural and into Eastern EuropeFor the band of the same name, see Europe (band . Europe is a continent forming the westermost part of the Eurasian supercontinent. Europe is bounded to the north by the Arctic Ocean, to the west by the Atlantic Ocean, to the south by the Mediterranean Se.

The occurrences are all of a similar ancient age, 1 - 2x10⁹ years old, clustering around 1.3x10⁹. Mapped onto the Pangean continental configuration of that era, they are all contained in a single straight belt. The conditions and constraints of this pattern of origin and distribution are not clear.

The main economic values of anorthosite bodies is the titaniumscandium titanium vanadium Ti Zr Full table General Name, Symbol, NumberTitanium, Ti, 22 Chemical series transition metals Group, Period, Block 4, 4 , d Density, Hardness 4507 kg/m3, 6 Appearance Silvery metallic Atomic properties Atomic weight 47. 867 am bearing ilmenite. The mafics are also a good source of ironThis article is about metallic iron. For the ironing device, see ironing manganese iron cobalt Fe Ru Full table General Name, Symbol, Number iron, Fe, 26 Chemical series transition metal Group, Period, Block 8 (VIIIB), 4 , d Density, Hardness 7874 kg/m3,. Workable titanium minerals are easily obtained from placer depositIn geology, a placer deposit is a deposit of earth, sand, or gravel, containing valuable minerals in particles, especially by the side of a river, or in the bed of a mountain stream. Placers may also be found at the oceanside, deposited by the action of ws, though, and more commercially developed iron oreAn ore is a mineral deposit containing a metal or other valuable resource in economically viable concentrations. Usually, it is used in the context of a mineral deposit from which it is economical to extract its metallic component. Ores are mined. Ore bods generally displace anorthosites, making them secondary sources.

Anorthosite was prominently represented in rock samples brought back from the Moon, and is important in investigations of Mars, Venus and meteorites.