14 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 148 



the Dutch Valley quadrangle, in the same outcrop belt as the Thorn 

 Hill section studied by Hall and Amick, at a distance of 10 miles along 

 the strike. The beds dip 42°-A5° S. The Nolichucky-Copper Ridge 

 contact is exposed in a ravine on the E. side of the railroad and seems 

 to be rather gradational, the dolomite content increasing upward. 

 Only the basal part of the upper (Maynardville) limestone member 

 of the Nolichucky is exposed in the railroad cut, the best exposures 

 being on the E. side. Below the limestone, every bed to the base of the 

 Aphelaspis zone is visible. 



Thickness 

 Feet 

 16. Limestone, ribboned with shale and dolomite, rather poorly exposed 



in ravine ; only lowest 6 feet exposed in railroad cut 70 



Collection cnx/20, 2-6 feet above base : 

 Aphelaspis tarda cc 



15. Shale 5 



14. Limestone, ribboned with shale and dolomite 21 



Collection cnw/20, 4-7 feet below top : 



Aphelaspis punctata c 



*Aphelaspis tarda cc 



Cheilocephalus brachyops r 



Dunderbergia tennesseensis r 



13. Shale, finely fissile 12 



12. Shale, with thin limestone beds and lenses 16 



Collection cnt720, 8 feet above base : 

 Aphelaspis arsoides c 



Aphelaspis tumifrons cc 



P seudagnostus communis c 



Collection cnt/20, 2 feet above base : 

 Aphelaspis tumifrons c 



Pseudagnostus communis r 



11. Shale : finely fissile, lacking limestone beds 14 



10. Shale, with thin limestone beds and lenses ; one thick limestone bed 



at base 10 



Collection cns/20, 0-4 feet below top : 



Aphelaspidella macropyge c 



Aphelaspis arses c 



* Aphelaspis rotundata c 



*Paraphelaspis vigilans c 



9. Shale : finely fissile, lacking limestone beds 9 



8. Shale, with thin limestone lenses 2 



Collection cnr'/20 : 

 Aphelaspis camiro c 



Aphelaspis laxa c 



Aphelaspis quadrata c 



Glaphyraspis oderi r 



7. Shale : finely fissile, lacking limestone beds 5 



6. Shale, with thin limestone beds and lenses ; a few limestone beds up to 



4-5 inches thick, one at top 22 



