The arrangement of rock into thin, sheet-like layers; the process of beating metal into thin leaves; the numbering of pages in a manuscript.
From Latin 'foliatio,' derived from 'foliatus' (having leaves), with the noun-forming suffix '-ion,' referring to the process or result of creating layers or leaves.
Foliation in metamorphic rocks is like the universe's way of keeping secrets—the stripes and layers tell geologists the exact temperature and pressure the rock experienced deep underground!
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