420 SUPERIOR SANDSTONES. 



compartments ; and it sometimes also happens, 

 as in the accompanying" limestones, that two 

 flattened spheroids are connected by a cylindrical 

 stem, so as to resemble a military projectile 

 known by the name of bar, or double-headed 

 shot. 



It is not un frequent, in these sandstones, to 

 find some strata filled with small cylindrical con- 

 cretions resembling worms, placed parallel to 

 each other, and vertically to the plane of the stra- 

 tification ; but the cause of this, as of the other 

 singular appearances of a similar nature, is as yet 

 unknown. 



Indurated laminae, similar to those already 

 described in the red sandstone, and often inter- 

 secting each other, are also found in these rocks ; 

 and they are detected, like all the rest of these 

 peculiarities, only by the action of the weather. 

 In this way, evidence is sometimes afforded, of 

 the decomposition, in situ, of beds of sandstone ; 

 as these laminae, or veins, are sometimes found re- 

 taining their original hardness and imbedded in 

 a mass of loose sand. At Kildrummie in Aber- 

 deenshire, a very striking example of this is to be 



