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Geology: Walk Through Time

Eureka Quartzite

sample of Eureka quartzite in Death Valley
350 foot thick, 440-450 million years old. A true quartzite formed from metamorphosed sandstone formed in a dry environment. About the time of this formation land plants begin to appear.

Phanerzoic eon > Paleozoic era > Ordivician period > Upper epoch > Hirnantian age

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