LIVINGSTON COUNTY. 241 



Ft. In. Ft. In. 



4. Limestone * 29 2 



5. Brown shale ■* 33 2 



6. Eedshale 2 35 2 



7. Blueshale 1 36 2 



8. Limestone IT 6 53 8 



9. Blackslate 1 54 8 



10. Brown shale 8 2 62 10 



11. Limestone 6 68 10 



12. Darkshalo ! 2 70 10 



13. Limestone 5 75 10 



14. Eedshale 16 91 10 



15. Blue shale 40 131 10 



16. Black slate , 14 145 10 



17. Blackslate 19 164 10 



13. Blackslate 12 176 10 



10. Eock— limestone ? .' 4 6 181 4 



20. Soapstone 1 182 4 



21. Coal 4 6 180 10 



23. Dark slate— 2 in. clay on top 12 198 10 



23. Brown shale 7 205 10 



24. Dark slate 6 6 212 4 



25. Brown shale 12 224 4 



26. Very dark clay 7 231 4 



27. Blackslate 50 281 4 



28. Bock— limestone 7 6 288 10 



29. Soapstone 18 306 10 



30. Limestone 6 312 10 



31. Soapstone — hard 20 332 10 



32. Black slate— hard 30 362 10 



33. Septaria, containing bitumen 2 364 10 



34. Fire-clay? 3 367 10 



35. Coal < S 6 370 4 



36. Fire-clay 3 6 373 10 



I do not regard the section as a reliable one. Some specimens of 

 Ariculopecten rectilaterarius, found in the waste pile, were reported as 

 from No. 27 of the section, and Productus longispinus, said to be from 

 No. 3i. 



The following is a copy of A. Matson's boring at Pontiac, one-quarter 

 of a mile north-east of the coal shaft, made in 1863 : 



Ft. Ft. 



1. Drift 18 



2. Limestone 1 19 



3. Blue slate 9 28 



4. Hard rock 4 32 



5. Eedshale 13 45 



6. Blue shale 20 65 



7. Hard rock 10 75 



8. Light-colored shale 20 95 



Hard rock 4 99 



10. Eed shale 18 117 



11. Blue shale.. 30 147 



12. Black shale 9 156 



13. Blue shale 44 200 



14. Coal shale 3 203 



15 Coal 1 204 



16. Bine shale 23 227 



17. Black Hhalo 5 232 



—32 



