46 GEOLOGICAL SURVEY OF ALABAMA 



confined to the six properties owned by the Coosa County 

 Mining Company of Wetumpka, Ala., of which properties 

 Mica Hill has been the major operation. It is located in 

 the Southwest Quarter of the Southwest Quarter of Sec- 

 tion 7, Township 22 North, Range 24 East, being about 

 six miles northeast of Dadeville, near Easton, and about 

 ore quarter mile south of the main road known as the 

 Montgomery Highway. 



Topographically, the mine occupies the crest of a hill 

 forming one of the highest points in the county, having 

 an elevation of approximately 850 feet, tidal datum, and 

 a rise of about 100 feet above adjoining valley level. 



In conformation, the summit of the hill is cruciform, 

 with the easterly arm eroded or lacking, the pegmatite 

 bodies being similarly cross formed, and approximately 

 occupying both axes of the hill. The country rock is a 

 reddish mica gneiss, the pegmatite contact with which is 

 somewhat irregular. Large masses of barren quartz out- 

 crop on the summit along the northwest-southeast bone or 

 axis of the hill, dividing and separating the two distinct 

 pegmatite bodies, which as developed, for a distance of 

 some five to six hundred feet, have a general southwest 

 dip varying on the slopes and shafts driven, from 35 to 

 perpendicular. On and near the surface, the two pegma- 

 tite bodies appear to be some 50 feet apart, separated by 

 a massive V-shaped quartz intrusion, approaching each 

 other rapidly at the lower levels reached, their ultimate 

 union at lower levels being indicated. 



For purposes of identification and description, the east- 

 erly body of pegmatite has been known as the "punch 

 vein." It was originally entered and worked by open 

 cuts along its extension on the surface for some 500 feet. 

 Subsequently, three slopes, located about 100 feet apart, 

 have been driven down following the pegmatite seam for 

 varying distances, the main and most northerly of these 

 slopes being carried down to a connection with a vertical 

 shaft, located in the westerly pegmatite body used as an 

 air course. From this main slope, which was operated 

 by means of a hoist, entries were run out at various levels 

 north and south in the mica bearing pegmatite. 



