Reviews. 



Geological Survey of Georgia: The Paleozoic Group : The Geol- 

 ogy of Ten Counties of Northwestern Georgia, and Re- 

 sources. By J. W. Spencer, A.M., Ph.D., F.G.S. (L. and 

 A.), State Geologist. Published by Authority. Atlanta, 

 Ga. Geo. W. Harrison, State Printer, 1893. 

 The state of Georgia has been somewhat unfortunate in the matter 

 of Geological Surveys. That under the direction of Dr. George Lit- 

 tle was discontinued before the publication of any extended report 

 upon the work accomplished, and thus the results of a number of 

 years of field work by competent geologists were lost to the state. The 

 survey under Dr. Spencer was from the first heavily handicapped by 

 the action of the Advisory Board in appointing the assistants without 

 consultation with the State Geologist. It seems probable that this 

 action of the Board will have the result of causing the loss to the state 

 of all the work of the assistants so appointed. It is very much to be 

 hoped that the Advisory Board will profit by past experience, and 

 under the new organization will leave the choice of his assistants to 

 the State Geologist, Professor Yeates, who is the successor of Dr. 

 Spencer in this important position. Under no other conditions could 

 a geologist with any justice be held responsible for the conduct and 

 results of a survey. 



The present volume records the work of Dr. Spencer in the Paleo- 

 zoic terrane of Georgia, and a previously published report has dealt 

 with the Tertiary and newer formations of the southern part of the 

 state. 



In chapter I, there is a general sketch of the geological structure 

 of northwestern Georgia, in which are discussed in general terms, and 

 in non-technical language, the formation and destruction of rocks ; 

 the effects of terrestrial movements on the growth of strata ; the dis- 

 turbances and dislocations of the original beds ; the origin of valleys. 

 In chapter II, the formations of northwestern Georgia are given in 

 tabular form, with their equivalents in other states ; in general the 

 names first proposed by Dr. Safford for Tennessee find acceptance in 



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