Bannockburn Porphyry (Matachewan Porphyry), showing feldspar phenocrysts in a mafic matrix Canada, igneous rock
Bannockburn Porphyry (Matachewan Porphyry), Bannockburn Township, Timiskaming District, Ontario, Canada, igneous rock with large phenocrysts in a mafic matrix
Size: 5760px × 3840px
Photo credit: © John Cancalosi / Alamy / Afripics
License: Licensed
Model Released: No
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