584 COAL MEASURES OE MARYLAND 



that they are recognizable throughout this wide* area by their distinctive 

 faunas, prevalent lithology. sequence, and systematically increasing inter- 

 vals. The results thus far given rest upon the work of many independent 

 investigators. Preston County, West Virginia, immediately adjoins the 

 State of Maryland. 



Upper Youghiogheny basin. AVest Virginia and Maryland. This basin 

 lies both in eastern Preston County, West Virginia, and in Garrett 

 County, Maryland, 15 miles east of the preceding locality. 



The section observed in this basin ^^ may be compared with that given 

 by White and his associates in western Preston County, as follows: 



West Preston Countif. West Virrjinia East Preston County. West Tirginia- 



Garrett Count}/. Mart/land 



Ames limestone and fauna. Ames limestone and fauna. 



Harlem coal. Harlem coal. 



Eicing limestone. Eicing limestone. 



Pittsburgh red heds. Pittshurgh red t)eds. 



Saltshurg sandstone. ^altshurg sandstone. 



Coal. Coal. 



Albright limestone. Albright limestone. 



Cambridge limestone and fauna. . 



{Meyer sdale^ red beds. Meyer sdale red beds. 



Buffalo sandstone. Buffalo sandstone. 



Brush Creek limestone and fauna. Brush Creek limetsone and fauna. 



Brush Creek coal. Brush Creek coal. 



Thickness, 200 feet. Thickness. 222 feet. 



The above sections include the same important beds in the same order 

 at similar intervals, the only significant difE'erence being the absence in 

 the Maryland section at this point of the Cambridge limestone and famia. 

 The latter is found in Maryland, however, in the Friendsville area, which 

 immediately adjoins this basin on the north, where it is well developed 

 and in its proper position. The slight difference in intervals harmonize^ 

 with the general thickening eastward. The similarity of the lithology 

 of the sections, the agreement of fatmas, intervals and sequence, are so 

 complete and the distance between the sections is so small that their 

 identity is evident. This conclusion is further fortified by the agree- 

 ment of the remainder of the section (see columnar sections). 



Upper Potomac basin. Maryland. This basin lies 10 miles east of 

 the Upper Youghiogheny basin, from which it is separated by the Oak- 

 land anticline. ^^ The section includes the following: 



1* By Swartz and Price. 



15 The authors are greatly indebted to Mr. M. D. Kirk, of tlie Davis Coal and Coke 

 Company, for the privilege of examining the records of a large number of diamond 

 drill-holes put down by this company in the Maryland portion of the basin. The data 

 so obtained were invaluable in interpreting the stratigraphy of the region. 



