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