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Lower Cambrian |
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Lower Cambrian [′lō·ər ′kam·brē·ən] (geology) The earliest epoch of the Cambrian period of geologic time, ending about 540,000,000 years ago. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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By referring to Early Cambrian rather than Lower Cambrian, the definition (and concept) is more direct. Things like Anomalocaris indicate that there were very highly evolved, large, well-adapted predators even in the lower Cambrian. The host rocks range from lower Cambrian to Lower Devonian and Mississippian in age. |
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