The lighter parts are known as plagioclase feldspar, while the darker areas, called lunar maria, consist of a mineral called pyroxene. These are volcanic rocks that give the Moon its unique grey ...

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They are then divided into three broad classes—H, L and LL—based on the iron content of the meteorites and the distribution of iron and magnesium in the major minerals olivine and pyroxene.

The term "alert and oriented" (AO) is a medical notation describing a person's level of consciousness and cognition (the ability to understand and learn through thought, experiences, and the senses).

The use of "anno domini" and "before Christ" to mark time began in the early days of Christianity, and they're still used to track calendar years today. When reading historical texts or delving ...

The grains are subrounded with low sphericity. Among the main constituents are the grains of quartz, K-feldspar, plagioclase, muscovite, and opaque minerals. Pyrite and clay minerals such as kaolinite ...