196 REVIEWS 



made in correcting this situation is indicated by the fact that the classi- 

 fication of this report has been approved by the United States Geological 

 Survey and is now official for the state surveys of Kansas, Iowa, and 

 Nebraska with one minor exception in each of the last two states. 



Lithologically, the series is made up chiefly of shales alternating 

 with limestones. Sandstones, clay, and coal are found in lesser quanti- 

 ties. Most of the lithologic units are quite persistent laterally, but 

 a few are notably lenticular. The broader features of the present 

 structure have resulted from two periods of folding since the close of the 

 Pennsylvanian. The first of these developed monoclinal dips to the 

 west and northwest and the second formed a number of narrow anticlines 

 with associated synclines. The axes of these folds are markedly parallel 

 and trend northwest-southeast throughout the state. These are shown 

 on a structure contour map drawn on the basis of rather meager data. 



Invertebrate paleontology is the subject of an exhaustive chapter 

 by Dr. Girty. More than 250 collections containing more than 350 

 species form the basis of his report. The species are listed by localities 

 and by zones for each formation, and the valuable data of these lists is 

 made available more readily by a composite table showing the range of 

 each species. Descriptions and illustrations are given of a number of 

 species that are new or have been called into question. Paleobotany 

 is discussed in a short chapter by David White. 



* Some progress has been made in correlating the Missouri series with 

 eastern areas. Paleontological evidence indicates that the lower part 

 of the Cherokee is of Pottsville age and the upper part is basal Allegheny. 

 It is suggested on the basis of incomplete collections that Allegheny 

 time extends to the unconformity in the Pleasonton and that Conemaugh 

 time ends well up in the Shawnee. 



The writers of this valuable report did not fail to include a chapter 



of bibliography which includes all the important publications consulted 



in its preparation. 



W. B. W. 



The Red Iron Ores of East Tennessee. By Ernest F. Burchard. 



Bull. Tenn. Geol. Survey No. 16, 1913. Pp. 173, pis. 17 



(including 5 maps), figs. 30 (including 6 maps). 



The purpose of this report is to describe and explain the origin of 



the red iron ores as they occur in the Cumberland Plateau and the 



Great Valley in east Tennessee. 



