tholeiite
tho·lei·ite
noun \ˈtō-lə-ˌīt, ˈthō-\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
— tho·lei·it·ic \ˌtō-lə-ˈi-tik, ˌthō-\ adjective
Origin of THOLEIITE
German Tholeiit, from Tholey, village in Saarland, Germany + German -it -ite
First Known Use: 1866
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