Reviews. 



Department of Geology and Natural Resources of Indiana, Twenty- 

 fourth Annual Report. By W. S. Blatchley, State Geolo- 

 gist. Indianapolis, Ind., 1899. 



The current report is a healthy-looking volume of 1078 pages, 

 devoted mainly to the natural history of the state, exclusive of geol- 

 ogy. It is well printed and bound, and but one criticism need be 

 made of its typographical make-up, namely, that the title upon the 

 back is not uniform in style and does not align with the titles of pre- 

 ceding volumes ; nor they with each other, for that matter. 



W. S. Blatchley (pp. 3-40) gives a brief resume of the natural 

 resources of the state, embodying the salient points appearing in pre- 

 vious reports of the department, together with such facts and statistics 

 as have been brought in the recent work of the department. 



Aug. F. Foerste (pp. 41-80) in an interesting paper discusses the 

 synonomy and correlation of the Middle Devonian of Indiana, Ken- 

 tucky, and Ohio, as embraced in the Cincinnati Anticlinal Region. 

 The formations involved are the Madison beds (Upper Ordovician), 

 Clinton, and Osgood Shale (Lower Niagara). The Madison beds, 

 unfossiliferous and somewhat arenaceous, have caused much confusion, 

 being variously classed as Clinton, Medina, and Ordovician. The 

 various formations referred to the Medina around the flanks of the 

 Cincinnati Anticline are to be correlated with the Madison beds. The 

 oolitic iron-ore facies of the Clinton does not appear west of the Cin- 

 cinnati axis, the Clinton being represented by a thin, salmon-colored 

 limestone. 



The author's opinions regarding the date of the Cincinnati Uplift 

 may be quoted here in advance of the fuller conclusions promised at 

 an early date. "The considerable variation in thickness of these lime- 

 stones .... suggests that the Clinton lies unconformably upon the 

 Lower Silurian, and that this unconformity could be well established 

 if a careful study of this problem were made. The writer was, how- 

 ever, not able to find anything suggesting that this unconformity was 

 in any way related to the formation of the Cincinnati axis. If the 



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