AAA AAA TEA 
PLATE 
Prar E 
Prar E 
il 
= 
oO. 
EXPLANATION OF PLATES. 
Geological map and section of an area three miles square, north- 
east of Deadwood, South Dakota. 
Fig. 1. Whitewood Peak from across Whitewood Canyon, show- 
ing escarpments of Minnelusa (cml), Pahasapa (cpa), and 
Whitewood (Ow) limestones, and Cambrian quartzite (€). 
Fig. 2. Small fault northwest of Whitewood Peak, showing 
Pahasapa limestone overlying the Englewood limestone and 
shale and the massive Whitewood limestone below, 
Porphyry stock, one mile northeast of Whitewood Peak. 
