. Economic Papers. two quartz streaks. The mica obtained from these mines is of fine qual-ity, with a clear rum color. Neal Bryson Mine.—The Neal Bryson mine is 1 mile south of West Mills,on the east side of Little Tennessee River. The mine is in a small depres-sion in a steep hillside. In this depression the soil has accumulated to adepth of several feet and carries mica from the breaking down of formerpegmatite bodies. A small amount of groundhog mining has been done inthis soil and debris for its mica content. The principal workings consistof an old shaft with drifts and stopes on the vein,
. Economic Papers. two quartz streaks. The mica obtained from these mines is of fine qual-ity, with a clear rum color. Neal Bryson Mine.—The Neal Bryson mine is 1 mile south of West Mills,on the east side of Little Tennessee River. The mine is in a small depres-sion in a steep hillside. In this depression the soil has accumulated to adepth of several feet and carries mica from the breaking down of formerpegmatite bodies. A small amount of groundhog mining has been done inthis soil and debris for its mica content. The principal workings consistof an old shaft with drifts and stopes on the vein, a new 180-foot crosscuttunnel, and a shaft with other drifts. The mouths of the shafts are about60 feet above that of the crosscut tunnel. The old stopes from the old shaftextend down to the level of the new tunnel. The drift from this tunnel tothe east connects with the new shaft on this level and on a small level 15feet above. The position of the workings, with details of the formation, isshown in figure 4. N. 0 50 100 FeetI i uj—i—1 1 Figure 4.—Plan of Neal Bryson mine. Macon County, N. C. The pegmatite has an irregular east-west strike, with varying dip thatshows considerable warping. The dip ranges from vertical to 70° N. in oneplace and to 30° S. at the west end of the workings. The vein varies fromone foot in thickness in one part of the workings to 12 feet in others. Aquartz streak varying in thickness with the thickness of the pegmatite isincluded near the middle of the pegmatite where the latter is over 3 feetthick. The mica occurs in the feldspar between this quartz streak and themica gneiss walls. At the east end of the tunnel the vein is richest nextto the south wall. The quality of the mica from this mine is excellent. Campbell or Higdon Mine—The Campbell mine is about iy2 miles N. 75W. of Cowee Gap, where the Webster-Franklin road crosses. Over a dozentunnels have been run in on probably two or more veins. The mine is ina shallow cove or hollow on a
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