Digital-Desert : Mojave Desert
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ecology: wildlife - plants - geography: places - MAPS - roads & trails: route 66 - old west - communities - weather - glossary
ghost towns - gold mines - parks & public lands: wilderness - native culture - history - geology: natural features - comments
Glossary of Terms & Definitions
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PRECAMBRIAN - The oldest and largest division of geologic time, between the consolidation of the earth's crust and the beginning of the Cambrian period; includes all time from the origins of the earth to about 600 million years ago; about 4 billion years in duration.




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

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