Browse Items (35 total)

  • Collection: (BB) Boulder Batholith Suite -- Montana

coarse grained, light gray biotite-hornblende

coarse grained, light gray

medium grained, medium gray w/ pinkish tint

coarse grained, medium gray

medium grained, light gray

medium grained, dark grey, biotite-hornblende granodiorite

fine grained, light gray

possibly crystal tuff

massive, tabular, sharp-edged blocks

basic

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