A mineral or fossil formed by the infilling or insertion of material into cavities or spaces in rock.
From Greek 'embolos' (wedge, insertion) + '-ite' (suffix for minerals and stones). Geological terminology combining Greek root with mineralogical convention.
Geologists found a word for when minerals literally wedge themselves into tiny rock cracks—'embolite'—giving us a perfect example of how ancient Greek words keep finding new jobs in modern science!
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