WATER WORN QUARTZITE PEBBLES. I THANK THE USGS FOR THE USE OF THIS IMAGE.
SANDSTONE, SILTSTONE, SHALE, COAL, LIMESTONE, DOLOSTONE, CONGLOMERATE, BASALT, METACONGLOMERATE, METASANDSTONE, PHYLLITE, SCHIST, GNEISS, METABASALT, GRANULITE, CHARNOCKITE, BIOTITE GNEISS, METAGRAYWACKE, MICA SCHIST, AMPHIBOLITE, QUARTZITE, GABBRO, ANORTHOSITE, PHYLLONITE, GRANITE, RHYOLITE, QUARTZ MONZONITE, GRANODIORITE, DIORITE, AND GRANITIC GNEISS.