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