28 PP. REPORT OF PROGRESS. FONTAINE & WHITE. 



We find also at this place plants which have not as yet 

 been seen at any other locality. The shales which contain 

 the plants, though varying much in thickness, are pretty 

 evenly bedded, and of fine texture, showing no evidence of 

 differences of level or of currents which could account for 

 the peculiar distribution of the plants. The unquiet con- 

 dition of things marked by the fluctuations of the shale 

 parting inclosed in the coal-bed, seems to have been suc- 

 ceeded by a period of quiet deposition of sediment, which 

 was followed by an era of great disturbance, productive of 

 the Waynesburg Sandstone. 



