| 11. | Black shales from Llanvirnian times are found in the Central Coal Basin eastern side.
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| 12. | The Ordovician rocks are graptolitic black shales and grits of Llandeilo and Caradoc age.
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| 13. | The Lochkovian consists of black shales and limestones and is very rich in conodonts.
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| 14. | Above this is black shale containing the Lantian biota fossils.
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| 15. | There are works in black shale and schist, polished almost to a metallic sheen.
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| 16. | The highest part of the formation is black shale again.
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| 17. | These black shales and slates include the Singhie shales, Sarpo Laggo slate, and Pasu slates.
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| 18. | The black shales also contain high amounts of sulfides ( marcasite, pyrite ) and carbon.
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| 19. | Wolfe was startled to find bits of a massive dinosaur horn scattered on black shale.
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| 20. | The Lower Cherts comprise 50 m of black, phosphate nodule-bearing cherts interlayered with black shales.
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