. Economic Papers. t of biotite is associated with it. Winecoff Mine.—The Winecoff or old Jacobs mine is 2% miles northwest-of Franklin. It has been opened for a distance of about 300 yards, in anorthwest-southeast direction, by numerous shafts, pits, cuts, and plan of the workings is given in figure 5. At 1 remains of ancient work-ings were found, and later four shafts with groundhog tunnels were pegmatite has, a width of about 25 feet where exposed in these openingsand is badly decomposed. The principal developments to the northwestwere made by the last owner, Mr. Winecoff
. Economic Papers. t of biotite is associated with it. Winecoff Mine.—The Winecoff or old Jacobs mine is 2% miles northwest-of Franklin. It has been opened for a distance of about 300 yards, in anorthwest-southeast direction, by numerous shafts, pits, cuts, and plan of the workings is given in figure 5. At 1 remains of ancient work-ings were found, and later four shafts with groundhog tunnels were pegmatite has, a width of about 25 feet where exposed in these openingsand is badly decomposed. The principal developments to the northwestwere made by the last owner, Mr. Winecoff, before 1907. At 2 a pegmatiteledge was exposed in an open cut varying in thickness from 5 feet at thesurface to 8 feet in the bottom of the cut. At 3 a shaft 35 feet deep en- MINING INDUSTRY. 45 countered a pegmatite ledge inclosing quartz bands. At 4 and 5 two shaftsreported to be 65 feet deep exposed a pegmatite ledge varying from 2 to 8feet in thickness and containing quartz bands. At 6 a shaft about 40 feet. 500 1000 Feet I b ShaftO Pity/ Tunnel\ Strike and dip. Figure 5.—Plan of Winecoff mine, Macon County, N. C. deep connecting with a crosscut tunnel and drifts encountered a pegmatitecomposed of a 6-foot streak of quartz with small feldspar streaks along thesides. The workings at 1 are probably on a different pegmatite body fromthose to the northwest, though it is possible that a swing in the strike(northwest) at 1 might bring the same pegmatite ledge to 2 and otherpoints. The strike and dip of the pegmatite are shown by appropriate marksat 1, 3, and 6. The banded appearance of the vein is marked in openings 3to 6 by streaks of quartz and mica schist, in the pegmatite and parallel withits walls. The principal field of mica has been from the workings at 1 and4 to 6. Possibly the same pegmatite was opened at the old Harris or Rabymine, about 75 yards northwest of and across a branch from the Winecoffmine. The mica from each of these mines has a clear rum color and is
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