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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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ecology: wildlife - plants - geography: places - MAPS - map/sat - roads & trails: route 66 - old west - communities - weather - book store
ghost towns - gold mines - parks & public lands: wilderness - native culture - history - geology: natural features - glossary - comments
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