Reviews. 



Zinc and Lead Region of North Arka7isas. By John C. Branner 

 (Arkansas Geological Survey, Annual Report 1892, 396 

 pp., Little Rock, 1901.) 



The lead and zinc deposits of tiie Ozark region have received 

 attention from the geological surveys of Arkansas, Missouri, Kansas, 

 and the federal government. The United States Geological Survey 

 and the University Geological Survey of Kansas W\\\ shortly have out 

 reports on the subject. Missouri, through her geological survey, has 

 already published an exhaustive account of the deposits in two large 

 volumes, by Mr. Arthur Winslow. After delays of nearly ten years, 

 Arkansas has at last seen fit to make appropriations for the publication 

 of the report on the zinc and lead deposits of the north part of the 

 state. It is by the former state geologist. Dr. J. C. Branner. 



The publication of Dr. Branner's report has long been looked for- 

 ward to by all interested in the subject of lead and zinc. In many 

 respects it is the most welcome contribution to our knowledge of the 

 geology of the Ozark region that has yet been made. 



Preliminary to the consideration of the ores is a short description 

 of the surface relief of the region, illustrated by an excellent photo- 

 graphic reproduction of Branner's Relief Model of Arkansas. The 

 zinc and lead deposits described are located chiefly north of the 

 Arkansas river. " The region here included under the name of Ozark 

 plateau embraces nearly all of that part of the Ozark mountains within 

 the state of Arkansas. It includes almost the entire region between 

 the Arkansas river and the Missouri line, and between the St. Louis, 

 Iron Mountain «& Southern railway and the Indian Territory line. 

 The Ozark region in Arkansas is made up of three plateaus that rise 

 like ragged-edged steps one above another, each with a few outliers 

 standing out upon the next step below." 



In order of their importance, the zinc ores of northern Arkansas 

 are sphalerite, smithsonite and calamine, besides several other miner- 

 als of zinc which do not occur in sufficient quantities to entitle them 

 to be looked upon as ores. 



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