QUARTZITE

QUARTZITE

Quartzite is a metamorphic rock formed when quartz sands are subjected to extreme heat and pressure due to tectonic forces. Pure quartzite is white. The individual quartz crystals are generally visible.

Like a marble, color and patterns in quartzite are the result of impurities. Quartzite is very hard (unlike a marble), having a Mohs hardness of 7 (it easily cuts glass), and is not acid or water soluble. Being thus resistant to weathering, it often forms ridges and hilltops.

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IGNEOUS: ANDESITE; ANORTHOSITE; BASALT; CARBONATITE; DACITE; DIORITE; DUNITE; GABBRO; GRANITE; KIMBERLITE; KOMATIITE; LAMPROPHYRES; MONZONITE; OBSIDIAN; PEGMATITE; PERIDOTITE; PUMICE; PYROXENITE; RHYOLITE; SCORIA; SYENITE
METAMORPHIC: GNEISS; MARBLE; QUARTZITE; PHYLLITE; SCHIST; SERPENTINITE; SLATE; SOAPSTONE
SEDIMENTARY: ANHYDRITE; BANDED IRON FORMATION; BRECCIA; CHALK; CHERT; CLAYSTONE; COAL; CONGLOMERATE; COQUINA; DOLOMITE; GEODES; GYPSUM; HALITE; LIMESTONE; MUDSTONE; PHOSPHORITE; SANDSTONE; SHALE; SILTSTONE; TILLITE
UNCONSOLIDATED SEDIMENTS: ALLUVIAL DEPOSITS; LAHARS; MORAINES; PEAT; SANDS; SOILS; TEPHRA; TILLS; ORES; MINING TALUS PILES
PRIMORDIAL: COMETS; ASTEROIDS; METEORITES; CHONDRITES; CHONDRULES; CAI's; PRESOLAR GRAINS; METEORIC MINERALS

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