620 



GEOLOGY. 



tion. The Upper Barren Measures are commonly separated from 

 the Pennsylvanian system on the basis of their plant fossils, rather 

 than because of any stratigraphic break at their base. 



The Pennsylvania section of the Permian is shown in Fig. 287. 

 Farther north also, in Nova Scotia, New Brunswick, and Prince 



Limestone. 



■ - Sandstone. 



Limestone and shale. 



-Limestone and sandstone. 



33' 



8°' Concealed. 



144' Limestone, sandstone, and shale. 



I24H' Limestone, sandstone, and shale. 



IV Nineveh coal-bed. 



139k' Limestone, sandstone, and bituminous shale. 



84' 



68' 



Dunkard coal-bed. 



Limestone, sandstone, and shale. 



Limestone and shale. 



Coal. 



Limestone, sandstone, and iron ore. 



Limestone and sandstone. 



Jolleytown coal. 

 Limestone and sandstone. 



Limestone, sandstone, and shale. 



Coal. 



Washington coal-bed. 

 Little Washington coal-bed. 

 Waynesburg "A" coal-bed. 



Waynesburg "A" coal-^ed. 



Fig. 287. — Section of Permian in Pennsylvania. 



Edward Island, non-marine Permian strata rest on Carboniferous in 

 such a way as to show that sedimentation was not greatly interrupted, 

 and the two groups are separated on the basis of fossils only. The 

 Permian of Pennsylvania, West Virginia, and the Acadian region 

 seems to represent only the early part of the period, after which these 

 regions appear to have been no longer subject to deposition. 



Permian vertebrate fossils (not marine) have been found in what 

 appears to be the channel of a stream eroded in the Coal Measures 

 in eastern Illinois. 1 Beds thought to be Permian also occur in neigh- 

 boring parts of Indiana. 2 



West of the Mississippi, the Permian system has a more extensive 



1 Case, Jour. Geo!., Vol. VIII, pp. 698-729. . 



2 Blatchley and Ashley, 22d Ann. Rept. Indiana Dept. of Geol.,, etc., p. 22, and 23d 

 Ann. Rept., p. 80. 



