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pubs.usgs.gov · BULLETIN 1163- EXPLANATION Diabase Pzb Pzbc Beverly Syenite Highly variable fine- to very coarse grained white to gray to buff syenite composed essentially of micro-

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Page 1: pubs.usgs.gov · BULLETIN 1163- EXPLANATION Diabase Pzb Pzbc Beverly Syenite Highly variable fine- to very coarse grained white to gray to buff syenite composed essentially of micro-