Reviews 



West Virginia Geological Survey. Marion, Monongalia and Taylor 

 Counties. By Ray V. Hennen. I913. Pp. 844, pis. 33, 

 figs. II, maps 3; Cabell, Wayne and Lincoln Counties. By 

 C. E. Krebs. Pp. 483, pis. 26, figs. 6, maps 9, 



The report on the counties of Marion, Monongalia, and Taylor 

 discusses the industrial development, the physiography, the geology, 

 and the mineral resources of this district. These counties are in the 

 northern part of the state in the heart of the Appalachian coal field. 

 They are exceedingly productive of gas and oil and are rich in building 

 stones, glass sands, and clays. To all this must be added great agricul- 

 tural fertility. 



The surface of the region has been eroded to a strikingly mature 

 stage; it is almost entirely a country of steep slopes and very narrow 

 divides. Structurally this district forms part of the eastern flank of the 

 Appalachian Basin. The formations have a general western dip which 

 is modified by local folds. The structure contours on the geological 

 map make it evident that the gas has generally collected in the tops of the 

 anticlines, and that the oil has been found most abundantly upon the 

 flanks of the anticlines. A general section of the strata is as follows: 



Upper Carboniferous (Pennsylvanian) , 2,300-2,800 feet: 



Dunkard, or Permo-Carboniferous Series, 1,100-1,200 feet 



Monongahela Series, 260-400 feet 



Conemaugh Series, 500-600 feet 



Allegheny Series, 225-350 feet 



Pottsville Series, 250-300 feet 

 Lower Carboniferous (Mississippian) , 450-1,000 feet: 



Mauch Chunk Shales, 40-250 feet 



Greenbrier Limestone, 15-150 feet 



Pocono Sandstones, 400-600 feet 

 Devonian: 



Catskill Sandstones, 300-500 feet 



Chemung and Hamilton Shales, penetrated in Wheeling deep well 

 nearly 2,000 feet without reaching the Corniferous. 



The Dunkard beds are the so-called "Barren Measures," but they 

 carry several seams of coal; these are unimportant commercially but 



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