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Kalahira
For this item, we are to determine the name of the rock that is fine, dark texture and is made up of oceanic crust. The answer to this item is basalt. This type of rock is composed mainly of plagioclase and pyroxene minerals. It is most commonly form as an extrusive rock.
W0lf93
Basalt is a rock with a fine, dark texture that makes up the oceanic crust. Basalt is a very important igneous rock whcih has fine texture and is dark coloured. On the earth, it is mainly formed in the ocean tectonic plates. Basalt is very abundant on the moon also.

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