Rock formed by a great intrusion of
molten (igneous) material, in the Earth's crust. Technically speaking, it contains
at least twice as much plagioclase as orthoclase (both minerals are types of feldspar), as
well as minor accessory minerals, and is coarse-grained.
Non-geologists would look at it and call it granite, which it very much
resembles. Around the Phoenix area, it is more of a grayish color, whereas the real
granite is more pinkish or brownish.
Granodiorite, showing "stretched" fabric,
from the South Mountains, in Phoenix, Arizona.
This image is of a polished section, about 4 cm across.
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