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Porphyroblast
Title
Porphyroblast
Subject
A porphyroblast is the metamorphic equivalent of a phenocryst. Do not confuse them! It is a large crystal set into a finer-grained fabric, in a metamorphic rock.
Description
Compare with phenocryst.
Collection
Citation
“Porphyroblast,” 1A Collections, accessed April 9, 2024, https://wserv3.esc.cam.ac.uk/p1acollections/items/show/245.