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Geology: Walk Through Time

Crystal Spring Formation


1.2 billion ears old and 3,000 foot thick. This formation contains several rock types, many of which were formed in either marine (salt water) or fresh water environments. Shown here are a purple shale, a sandstone with crossbedding or a conglomerate.

Precambrian > Proterozoic eon > Mesoproterozoic era > Ectasian period

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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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