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Upper Cambrian |
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Upper Cambrian [′əp·ər ′kam·brē·ən] (geology) The latest epoch of the Cambrian period of geologic time, beginning approximately 510 million 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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The black shales forming the detached, imbricated allochthonous blocks can be subdivided into those belonging to the Middle Cambrian and Upper Cambrian, with the highest grades of mineralisation occurring in the Upper Cambrian black shales. The well was cased and tests through perforations were carried out in the lower and upper Cambrian and Lower Triassic zones. |
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