make a dichotomous key using these rocks: rhyolite granite andesite diorite basalt gabbro peridotite obsidian scoria pumice tuff sandstone shale conglomerate coal halite gypsum chert coquina [\u2026]<\/span><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[],"tags":[],"yoast_head":"\n