Mercer Limestone in Neivark-Zanesville Region 



297 



Bellerophon crassus Meek and Worthen 



Pleurotomaria sp. 



Loxonema cerithiforme Meek and Worthen 



Soleniscus fusiformis Hall 



Soleniscus klipparti Meek 



Phillipsia trinudeata Herrick 

 Crinoid segments and plates. 



East Fultonham. In the hill behind the plant of the Fulton- 

 ham Brick Company the Mercer limestone and underlying rocks 

 are exposed in a cliff about sixty-five feet high. This exposure is 

 the farthest east of any studied in this region, and is located near 

 the Fultonham station on Jonathan creek. 



THICKNESS 



TOTAI, 

 THICKNESS 



11. Surface clay. 



10. Mercer limestone. Massive dark blue limestone 

 which weathers lighter in color but does not be- 

 come shaly to any extent; contains crinoid seg- 

 ments and brachiopod shells. 



9. Coal. 



8. Fire clay with iron concretions. 



7. White micaceous sandstone containing a little fire 

 clay. 



6. Hard gray sandstone, rather thin bedded. 



5. Heavy micaceous sandstone, rather fine grained, 

 buff or gray, which contains some iron concretions 

 especially in the lower part, and is often iron 

 stained. The workmen at the brick yard say this 

 sandstone weathers to "bastard fire clay." 



4. Shale and fire clay, upper part light colored, lower 

 part darker, with numerous ore nodules. 



3. Sandy light colored fire clay, sometimes replaced by 

 hard bluish limestone, the upper 8 or 10 inches 

 with abundant nodules of iron ore. 



2. Blue shale. 



1. Fire clay. Covered to the Maxville limestone in the 

 banks of Jonathan creek; not measured. 



The following fossils were collected from the Mercer limestone 

 at the top of this section: 



