534 



REPORT OF NATIONAL MUSEUM. 1904. 



Safford's Final Report 

 on the Geology of 

 Tennessee, 1869. 



Later (in 1866) Niles and Wachsmuth studied the upper beds, which 

 had become known as the Burlington limestone, and were led by the 

 c rinoidal remains to regard the two divisions as two independent for- 

 mations, which the}^ designated as the Lower and Upper Burlington, 

 a subdivision which still holds. 



Safford's final report on the geology of Tennessee did not appear 

 until 1869, having been delayed by the incidents of the civil war. It 



was accompanied by a col- 

 ored geological map of the 

 State, and a geological sec- 

 tion, un- 

 co 1 o r e d , 

 extending 

 from the Unaka chain on the 

 cast of the Mississippi, and 

 giving, on the whole, a very 

 comprehensive and easity un- 

 derstood idea of the physical 

 geography and geology of 

 the State, as well as its eco- 

 nomic resources. He here 

 called attention to the fre- 

 quent recurrence of the same 

 formation, or series of for- 

 mations, met with in cross- 

 ing East Tennessee, and 

 accounted for the phenom- 

 ena on the theory that the 

 bed had been thrown into a 

 series of parallel and closely 

 compressed and overturned 

 folds, the crests of which had 

 been subsequently denuded 

 (see p. 488). 



Although on his map a section of the Ocoee conglomerate was put 

 down as belonging at the top of the Azoic series, in his chapter on the 

 Potsdam group it was stated that the Ocoee conglomerate and slates, 

 Chilhowee sandstones, and Knox group of shales, dolomites, and lime- 

 stones might be regarded as a formation which corresponds to Dana's 

 Potsdam period, and that it was not easy to separate, lithologically, 

 the Ocoee subgroup from the Chilhowee, as they often run into each 

 other. 



The main bulk of the report was given up to a discussion of the 

 distribution, lithological nature, and characteristic fossils of the vari- 

 ous formations. He was disposed to regard the Porter's Creek group 



79. — Charles Abiather White, Rush Emery, 



Orestes St. John. 



and 



