Tag Archives: geologic time scale

Shaking It Up


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Depending upon where you live in the United States, you may or may not be visited by an earthquake sometime soon. The areas of greatest concern lie along major fault lines (as in California and Alaska), but New Madrid, Missouri … Continue reading

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The Geologic Time Scale


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The geologic time scale is split into four major eras–Precambrian, Paleozoic, Mesozoic, and Cenozoic, and are subdivided into periods. The number beside the era or period in the infotoon below shows how many years ago it began. I thought it … Continue reading

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