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aplite
This term is used exclusively within the specialized register of geology and petrology. It describes a specific textural and compositional variety of igneous rock, characterized by its pale appearance and fine grain size. In a professional context, it is often used to describe the intrusive veins that cut through coarser rocks like granite.
As a technical classification of rock material, the term is treated as an uncountable mass noun. It refers to the substance of the rock itself rather than individual stones or specimens, meaning it does not typically take a plural form in scientific descriptions.
Meanings
Examples
The granite sample is intersected by several thin veins of white aplite.
Look at this outcrop where the aplite dikes cut through the darker host rock.
I wonder if this aplite vein indicates a late stage of magma crystallization.
The geologist noted that the aplite was remarkably fine grained compared to the surrounding pegmatite.
The geologist noted that the aplite was remarkably fine grained compared to the surrounding pegmatite.
Is this a true aplite or just a leucocratic granite?
The cliff face showed a striking contrast between the dark diorite and the pale aplite.
We found a network of aplite dykes extending across the entire quarry wall.
The composition of the aplite consists mainly of plagioclase and quartz.
The composition of the aplite consists mainly of plagioclase and quartz.