tholeiite

noun

tho·lei·ite | \ ˈtō-lə-ˌīt

How to pronounce tholeiite (audio)

, ˈthō-

How to pronounce tholeiite (audio)

\

Definition of tholeiite

: a basaltic rock that is rich in aluminum and low in potassium, is found typically in the ocean floor, and is probably derived from the earth's mantle

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The first known use of tholeiite was in 1866

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