M'GEE — NOTES ON THE GEOLOGY OF MACON CO., MO. 323 



1. Sandstone and arenaceous shales. 



2. Coal and coaly debris. 



3. Brown limestone. 



4. White limestone. 



The same succession may be observe J in adjacent hills, where, 

 indeed, these firm ledges and the soft associated shales j^ive cha- 

 racter to the topography. The stratigraphy here is significant 

 in that it supplements and connects the Claybank creek and May- 

 field sections. 



A good section is exhibited in the bluffs, in the mine, and in a 

 freshly excavated well near by, at the Mayfield coal-working 3 

 miles west of Excello. The sequence is as follows : 



9. May field Section. 



Feet. 



1. Brittle clinking limestone with splintery fracture, no fos- 

 sils 3 



2. Slope 10 



3. Moderately firm sandstone, about 4 



4. Slope 4 



5. .Vrenaceous shale or clay i 



6. Coal 5^ 



7. Under clay and slope, about 5 



S. White limestone, containing no fossils but abundant crys- 

 tals of calcite, generally pure but sometimes shaly 4 



9. Slope 13 



10. Blue clay ("in well) 



The base of this section is estimated to be 40 feet above the 

 bottom of the East Fork channel ; but the corresponding strata 

 in the road toward McGee College appear to be 10 or 20 feet 

 higher. 



Another instructive exposure occurs just below the bridge over 

 East Fork on the Excello road. It appears in the channel and 

 east bluff' of the river, which the stream there approaches. It is 

 as follows : 



10. £xceIlo Bridg'e .Section. 



Feet. 



1. Drift 10 



2. Heavy-bedded limestone in discontinuous ledges, gener- 



nWy pure but sometimes magnesian 4 



3. Thinly :ind smoothly laminated jet-black shale, with ovoid 

 nodules 5 



