Spotted hornfels 
A hornfels is a fine-grained contact-metamorphosed rock. The mineral responsible for the spots is probably cordierite or andalusite.
UNC sample
G-42
Rock type
spotted hornfels
Locality
?
Spotted hornfels A hornfels is a fine-grained contact-metamorphosed rock. The mineral responsible for the spots is probably cordierite or andalusite. |
UNC sample G-42 | |
Rock type spotted hornfels | ||
Locality ? | ||
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