390 F\ REPORT OF PROGRESS. E. W. CLAYPOLE. 



comparatively short distance. Its outcrop forms the usual 

 rough stony ridge overgrown with timber which the Hamil- 

 ton sandstone exhibits in its southeastern exposure. 



Toward the west the range suddenly disappears, the sand- 

 stone descending to and below ground level by the rapid 

 diminution of the throw of the fault, an account of which 

 will be found in the chapter devoted to that subject. 



Beyond the doubling of the sandstone by a fold at the 

 western end of Dick's hill, there is nothing more that re- 

 quires special notice. The bold peak called Round Top is 

 an anticlinal point connected with the main range by a ridge 

 called Dick's Hill bridge. From the Round Top the ridge 

 enters Carroll township and a partial gap is cut through it 

 by a small stream where the Dellville road passes. 



The Hamilton fossil ore, ( VII T.) 



This bed crops out in its usual position along the south 

 iiank of Dick's hill where it is of good thickness, and has 

 been mined on the land of Messrs. Dochterman, Lickel, 

 Rathvon and Heishley. It contains the usual fossils that 

 characterize it but requires no further mention. See chap- 

 ter on the Iron Ores. 



The Hamilton Upper shale, (VIII) 



As may be seen by inspection of the geological map this 

 shale runs along the south flank of Dick's hill, keeping at the 

 eastern end close under the ridge owing to the steep dip of 

 the beds. It is seldom exposed, and so far as I have been 

 able to examine it, it is less fossiliferous than near New 

 Bloom field. It zigzags with the Hamilton sandstone at what 

 is called Dirk's Hill bridge, and i^ then thrown much fur- 

 ther southward at the western than at the eastern end of 

 the township. Its dip is uniformly south-southeast, varying 

 a little frora an average of S, 30° E. Owing to the zigzag 

 above mentioned the Penestella shale is Found runningalong 

 the turnpike read, east from Rattlesnake hill, nearly to the 

 head of Dark Hollow, where, though the bend of the road 

 i- vciy slight, beds higher in the series are exposed. 



