M^GEE NOTES ON THE GEOLOGY OF MACON CO., MO. 327 



iximity of coal-seams. The samples were collected and preserved 

 by the well-driller and one or more representatives of the citizens' 

 committee acting- in conjunction with him ; and the depth from 

 which each was taken was indicated upon the box in which it 

 was preserved. In t!>e following notes the depths are transcribed 

 from this record. The specimens were personally examined ; and 

 the notes represent the inferences then made as to the character 

 of the strata from which specimens were derived rather than ac- 

 curate descriptions of the specimens themselves. 



15. >Iaroii Section. 



Thickness Total 

 of Stratum. Depth. 



1. Drift (no specimens preserved) 36' 36' 



2. Blue calcareo-argillaceous shale breaking down 



into clay with a few firm fragments 9' 45' 



3. Hard brittle blue limestone with conchoidal 

 fracture, mixed with shaly debris and mud evi- 

 dently derived from the breaking up of shale .... i' 46' 



4. Black shale breaking up into graphite-like mud 2' 48' 



5. Coal, with a few fragments of shale 1' 1" 49' i" 



6. Blue shale or clay containing a little grit, break- 

 ing down into mud, with a few shaly scales 5' 11" 55' 



7. Tenacious blue clay with a few shaly flakes and 



a trace of grit 10' 65" 



S. Gray calcareous shale with a few fragments of 

 limestone, of which some are veined with calcite 



and exhibit conchoidal fracture 5' 70' 



9. Black shale, the larger fragments of which ex- 

 hibit parallel lamination : 3 2.V' 73 2^ 



10. Coal I 9^ 75 



11. Tenacious blue clay containing a little gritty 



matter 33' 8" io8' 8" 



12. Black graphite-like clay with a few bits of gray 

 clay, the whole containing a little gritty matter 



and scales of shale 17' 4" 126' 



13. Dark gray or black clay evidently derived from 

 slightly calcareous shale containing fragments 

 of dark blue limestone 



14. Firm black carbonaceous shale 



15. Slightly calcareous gray clay with abundant 

 shaly scales 



16. Calcareous gray clay with shaly scales 18' 6" 155' 



17. Slightly calcareous dark gray shale 30' 185' 



