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| 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 |
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PALEOZOIC - The geological era between the end of the Precambrian (600 million years ago) to the beginning of the Mesozoic (225 million years ago). |
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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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