| 1. | In the Late Ordovician the turbidites were overlaid by a black shale.
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| 2. | They also occur in association with black shales of deep sea origin.
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| 3. | This rock unit is formed by quartzites, meta-black shales, amphibolites and skarns.
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| 4. | Many of these black shales are now rich in petroleum sources.
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| 5. | This is a black shale that is an important source of local fossils.
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| 6. | The Camp Run is a greenish-gray to olive-gray shale interbedded with brownish-black shale.
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| 7. | The background uranium content in the black shales is 40 to 60 ppm.
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| 8. | The south peak is a sharp pinnacle of black shale.
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| 9. | Higher levels of carbon dioxide in the black shale ".
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| 10. | The mineralisation is hosted by Palaeozoic meta-black shales and Meta-basalts.
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