PENNSYLVANIAN-PERMIAN GLACIATION 



475 



out smooth and striated surfaces and it rapidly destroys and oblit- 

 erates the smooth surface after removing the conglomerate. The 

 striated surface is therefore found only beneath the conglomerate, 



Fig. 4. — Striated fragment of floor of Conglomerate, Honey Creek valley 



or where the conglomerate has been removed recently by the erosion 

 of the present stream. Obviously the striated floor was formed 

 under a set of erosion conditions quite unlike those now occurring 

 in the valley. While the striations of the floor of the conglomerate 

 are very fine (see Fig. 4) , perhaps too fine to be especially distinctive 



