201 



Metres" 1 a ^ed °^ black slate and is often "frozen" to 

 quartzite footwall in which the corrugations 

 sink and form furrows. 



Corrugations of the same character are well 

 exposed 400 feet (120 m.) further east on the 

 footwall of a shaft on the Rusty lead, which 

 dips, 31 east and is supposed to be the conti- 

 nuation of the Sterling Barrel lead on the north 

 side of the anticlinal fault. 



Looking north from the top of the dump of the 

 Sterling Barrel mine a good general view may 

 be had of the workings along the outcrops of 

 the veins, showing the curvature of the north- 

 eastern part of the dome. 



From this point the road follows in a north- 

 easterly direction, crossing successively the 

 North Wallace, Rusty, Rutherford and Frank- 

 fort leads where they are worked more or less 

 along their outcrops by open-cuts and shafts. 

 A branch road to the southeast is then followed 

 along and across the Blue lead, to the Schaffer 

 Barrel lead. The Schaffer Barrel lead has here 

 been worked to a depth of 200 feet (60 m.) and 

 southward along the outcrop as far as the anti- 

 clinal fault. The quartzite footwall striking 

 south on a broad curve and dipping east 45 is 

 much corrugated in deep furrows; the furrows 

 pitch eastward and occur along the line of inter- 

 section of cleavage and bedding planes and are 

 apparently formed by the vertical movements of 

 the rock along the cleavage planes. The vein 

 and enclosing slate are crumpled into a series 

 of corrugations or barrels conformable with the 

 furrows. South of the shaft a pocket carrying 

 100 pounds of reddish scheelite associated with 

 ankerite was found in the vein at the depth of 

 40 feet (12 m.) in a large roll of quartz. The 

 Schaffer Barrel lead has a horizontal displace- 

 ment of 150 feet (45 m.) on the anticlinal 

 fault, 124 feet (37-6 m.) on the Whitehead fault 

 and 112 feet (34 m.) on the next one south. 



For a third of a mile farther east, a few other 

 interbedded veins occur on the eastern pitch 



