The Magnetite Belt at Cranberry, JV. C. — Kimlxi/J. 299 
tained biotite, hornblende, quartz, and the three feldspars, 
orthoclase, microcline and andesine-oligoclase as the essential 
constituents, with accessor}^ apatite, epidote, sphene, tourma- 
line, and perhaps zoisite. These accessory minerals all ex- 
hibit crystal form, of which they have a complete monopoly. 
Changes have since introduced kaolin, calcite, pyrite, and 
perhaps muscovite, and have considerably increased the epi- 
dote, apatite(?), zoisite and quartz. The essential constitu- 
ents and the general structure remain unaltered. 
Thus we have a true granite, though remarkabl}" poor in 
quartz. It has been called a gneiss*; but the gneissic char- 
acter is entirely Avanting in hand specimens, and is only 
barely traceable in a few small patches at the falls. It there- 
fore seems much better to term it a biotite-hornblende granite. 
ON THE MAGNETITE BELT AT CRANBERRY, 
NORTH CAROLINA, AND NOTES ON THE 
GENESIS OF THIS IRON ORE IN GEN- 
ERAL IN CRYSTALLINE SCHISTS. 
By James P. Ktmball, New York. 
(Plate XVIII.) 
The well known deposits of magnetic irf)n ore at Cranberr}', 
Mitchell county, N. C, near the Tennessee border, have onl}'^ 
since the year 1867 been systematically wrought, though pre- 
viously for a long period supplying a local bloomary from their 
decayed and disintegrated outcrop. Ineidentallj' to an exam- 
ination of a related magnetite belt in the year 1891, having 
taken occasion to study the remarkable developments at 
Cranberry, I now take occasion to indicate their principal 
features and, as it appears tome, their mode of genesis. j 
The locality is at the eastern base of the great Appalachian 
or Nolichucky plateau, compassed by the bifurcation of the 
*A. C. Lawson : Geoi. Surv. of Can. Ann. Rep. 2887. Pt. CO. P. 
12GF. 
tSince this paper was mainly prepared a valuable contribution to the 
study of the same subject by Mr. Henry B. C. Nitzehas been published 
hi Bulletin No. 1, (1893) of the State Geological Survey of North Caro- 
lina. This first comes to my notice on receipt of a copy from the State 
Geologist after filing the manuscript of the present pages for publica- 
tion. 
