Anorthosite
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Anorthosite is a phaneritic, intrusive igneous rock characterized by its composition: mostly plagioclase feldspar, with a minimal mafic component. Pyroxene, ilmenite, magnetite, and olivine are the ma
Anorthosite from Salem district, Tamil Nadu, India
Nain Anorthosite, a mid-Mesoproterozoic intrusion (1.29 to 1.35 billion years), Labrador. Polished slab; blue color is labradorescence.
Anorthosite from southern Finland
Anorthosite from Poland
Geology of the Moon
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The geology of the Moon is the structure and composition of the Moon, which is quite different from that of Earth. The Moon lacks a true atmosphere outside of a sparse layer of gas. Because of this, t
Anorthosite
…have different modes of occurrence, appear to be restricted to different periods in Earth's history, and are thought to have had different origins. Lunar anorthosites constitute the light-coloured areas of the Moon's surface and have been the subject of much research. The presence of Martian anorthosites…
False-color image of the Moon taken by the Galileo orbiter showing geological features. NASA photo
The same image in true color.
Ancient rift valleys – context
Ancient rift valleys – closeup (artist's concept)