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/ˈθoʊ.li.aɪt/ · noun
(geology) An igneous basaltic rock, formed from magma rich in magnesium and iron..
Correctly speaking, Hawaiian basalt is not just basalt, but is a special variety enriched in silica known as tholeiite.
Use tholeiite when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Tholeiite means (geology) An igneous basaltic rock, formed from magma rich in magnesium and iron..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Correctly speaking, Hawaiian basalt is not just basalt, but is a special variety enriched in silica known as tholeiite.
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