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QUESTION
make a dichotomous key using these rocks:rhyolitegraniteandesitedioritebasaltgabbroperidotiteobsidianscoriapumicetuffsandstoneshaleconglomeratecoalhalitegypsumchertcoquinaslatemica schistgneissmarblequartzit
make a dichotomous key using these rocks:rhyolitegraniteandesitedioritebasaltgabbroperidotiteobsidianscoriapumicetuffsandstoneshaleconglomeratecoalhalitegypsumchertcoquinaslatemica schistgneissmarblequartzitePhyllismigmatite
