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HORNFELS #1   (detail)
Hornfels     -   Other specific examples: #1 | #2 | #3 | #4
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Composition
     Hornfels can have any of a wide diversity of microscopic minerals, all too small to see or identify without thinsection and a specialized microscope.
     The pale green pyroxene and red garnet are diagnostic of this rock.
Description
     Nothing much has changed in this closeup. It is still a dark gray, dull, dense rock - except that we can see some larger mineral grains (porphoroblasts - large crystals in a rock produced by metamorphism which superficially resembles a porphyritic phenocryst in an igneous rock)
  

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Last Update: 10/25/00

e-mail: (Fichtels@jmu.edu)