12 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 148 



Thickness 

 Feet Inches 

 Collection cnp715, 1 foot below top : 

 Aphelaspis lata c 



Aphelaspis walcotti c 



Collection cnp/15, 2 feet below top : 



Aphelaspis lata cc 



Collection cno/15, 3-4 feet below top : 

 Aphelaspis buttsi cc 



Coosella perplexa r 



Glaphyraspis parva cc 



4. Limestone : 4 beds several inches thick, separated by shale 



and siltstone 3 4 



3. Shale, siltstone, and limestone : one 3-inch limestone bed in 



middles of unit 5 4 



Collection cnn/15 from loose pieces at foot of cliff, 

 presumably derived from this or preceding unit : 

 Amiaspis, sp. undet. 

 Coosia alethes 

 Crepiccphahis, sp. undet 

 Terranovella dorsalis 



2. Limestone conglomerate : one bed, well exposed near road 5-7 



1. Shale, siltstone, and limestone in part conglomerate, alter- 

 nating as in preceding imits, underlain by massive lime- 

 stone. This part of the section was not measured as it 

 yielded no fossils, and change in dip affects its lower 

 portion. 



As it can be seen from the faunal lists, this section offers one of 

 the most complete successions of Aphelaspis zone faunules observed 

 anywhere. Noteworthy is the collection cno/14 at the base of the 

 Aphelaspis zone, yielding Coosella, a genus more characteristic of the 

 Crepicephalus zone, associated with Aphelaspis buttsi, so far known 

 only from this locality in Tennessee, where it is believed to be the 

 oldest species of the genus. Equivalent beds will be described from 

 the Russell Gap section. 



GRAINGER COUNTY 



Smith Hollow. — A continuous section of the upper portion of the 

 Nolichucky formation is exposed in a road cut at Smith Hollow, 

 Luttrell quadrangle. The writer is indebted to Dr. Oder for leading 

 him to this locality and supplying measurements of the section. Collec- 

 tions at various levels were made by Dr. Oder and the author. A brief 

 description of the section in descending order follows. 



The uppermost part of the Nolichucky is the usual limestone in thin 

 beds, ribboned with shale or dolomite, alternating with minor shale 

 intervals. This suit is approximately 150 feet thick. 



Oder's collection No. 14A, about 80 feet below top of unit : 

 Aphelaspis tarda 



