2 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 148 



On the basis of published records, first a brief reconnaissance was 

 made of various areas of Cambrian outcrop in northeastern Tennessee 

 and some adjacent areas of Virginia in search for sections that might 

 yield the desired biostratigraphic information. Several belts of Cam- 

 brian outcrop did not appear promising for either one of two reasons. 

 For example, those north of Clinch Mountain yield a few well-exposed 

 sections, such as the ones at Thorn Hill, described by Hall and Amick 

 (1934), and at Lee Valley, described by Rodgers and Kent (1948). 

 However, most of these sections, with the notable exception of the one 

 near Washburn, hold few fossiliferous beds of the Crepicephalus and 

 Aphelaspis zones, and the preservation leaves much to be desired. On 

 the other hand, other Cambrian belts, such as those in the vicinity of 

 Greeneville and Morristown, yielded good fossils to the early collec- 

 tors, but the sections are fragmentary and poorly exposed. Several 

 localities were found that offered undisturbed, well-exposed, and highly 

 fossiliferous sections. 



Upper Cambrian fossils occur in northeastern Tennessee chiefly in 

 the upper portion of the Maryville limestone and in the Nolichucky 

 formation (including the Maynardville limestone). The overlying 

 Copper Ridge dolomite, which seems to represent most of the Fran- 

 conian and Trempealeauian stages, is almost totally barren. The few 

 trilobites collected from this formation are mentioned by Rodgers 

 (1953) and Bridge (1956). No search was made in the Copper Ridge 

 dolomite. 



Since the purpose of this paper is essentially paleontologic, no at- 

 tempt was made to discuss the stratigraphy and nomenclature of the 

 formations in question. This problem has been dealt with by Hall and 

 Amick (1934), Rodgers and Kent (1948), Rodgers (1953), and 

 Bridge (1956). The main points under discussion are whether the 

 Maynardville limestone should be recognized as a separate formation 

 or considered as the uppermost portion of the Nolichucky shale, and 

 where the Maynardville-Copper Ridge contact should be placed. Sev- 

 eral sections were measured and are described herein only in order to 

 precisely locate the fossiliferous beds and establish the succession of 

 the faunules. Questions of stratigraphic nomenclature are of secondary 

 importance for these purposes. 



Rodgers' geologic map of northeast Tennessee at the scale of 

 1 : 125,000 and the geologic map of the Mascot-Jefferson City zinc 

 district by Bridge were found exceedingly useful in searching for 

 possible sections and fossil localities. Dr. Charles R. L. Oder, Chief 

 Geologist of the American Zinc Company of Tennessee, who has been 

 studying the Maynardville limestone for years, showed the writer 

 several interesting sections. 



The area under consideration is covered by recent U.S. Geological 



