ECONOMICAL GEOLOGY. 
293 
This has been used in a neighboring furnace as a flux, and with very 
good results. 
CHROMIC IRON. 
Small quantities of chrome are found associated with some of the iron 
ores of the state, the lead which crosses Guildford county for example. 
But it is also found as chromic iron, in Coarsely crystalline masses, often 
of considerable size and ; n the form of very irregular veins, or pockets in 
the chrysolyte beds of Jackson, Yancey, Mitchell and Watauga counties. 
The most considerable deposits are two, one near Webster, and the other 
5 miles from Burnsville, on Jack’s Creek, at Hampton’s. An analysis of 
the former by Genth gave, 
Chromic Oxide, 63.32 
Ferrous u 25.01 
Magnesia, ..... 0.S5 
Lime, 1.32 
Silica and Alumina, 9.47 
There have been no openings at either of these points, but the out- 
crops are such as to justify experiments at both, whenever the facilities 
for transportation shall be sufficiently improved. 
SECTION III. USEFUL MINERALS, NOT ORES. 
COAL. 
The general facts in regard to the occurrence of mineral fuel in this 
state have been given in a previous chapter. It will be remembered 
that the principal coal beds are found on Deep River, in Chatham and 
Moore counties. The area of this coal fie d is given by Emmons as 
about 300 square miles. The quality of the coal is also discussed by him 
and by Admiral Wilkes 
, and various analyses are 
published ; 
the three 
following by the latter, 
of samples from different 
parts of the field : 
Carbon, 
59.25 
S4.56 
Volatile Matter, . . 
32.7 
30.50 
7.42 
Ash, 
10.21 
7.89 
Sulphur, 
1.3 
100.0 
99.99 
99. S7 
Specific Gravity,. . . 
1.2S 
1.41 
1.49 
