STRATIGRAPHICAL GEOLOGY 
247 
1500 feet. On the northwest side of the field the coal-bed dips 
at angles of 20 to 25 degrees; but within a few hundred feet 
of depth there is a general flattening towards the middle of the 
basin. At Farmville the dip along the axis of the basin is less 
than 5 degrees. Several narrow dikes of igneous rock cut the 
coal-bed at various points. These are likely to cause some slight 
trouble and extra expense in mining operations. Beyond the 
dikes the coal is again encountered in undisturbed condition. A 
few faults of small throw are present; but these are confined 
mainly to the margins of the basin. 
As shown by the following analyses the ash content of the 
coal is low. The sample is from the mine of the Carolina Coal 
Co., near Farmville, being taken from the face of the first left 
entry, 75 feet from the foot of the slope. 
Aniatyses of Triassic Coal 
Proximate Ana-eysis 
Ultimate Analysis 
Moisture. 
. 1.8 
Hydrogen . 
. 5.2 
Volatile matter .. 
.32.5 
Carbon . 
. 77.1 
Fixed carbon .... 
. 58.8 
Nitrogen . 
. 2.1 
Ash . 
_ 6.9 
Oxygen . 
. 6.3 
Sulphur . 
. 2.4 
Ash . 
. 6.9 
Total . 
. 100.0 
Total . 
. 100.0 
Calories, 7716. 
British thermal units, 13890. 
Analyst, H. H. Cooper. 
The mining conditions in the Deep River district are, on the 
whole, excellent. The roof is a thick bed of hard sandstone 
underlain by 2 to 10 inches of “draw slate.’^ The latter usually 
does not fall until some little time after the coal has been removed. 
The floor, which is composed of “black band,” offers an excellent 
hard foundation for the car tracks. As the coal-bed carries but 
very little water, the entries, galleries and rooms are comparatively 
dry. In the Cumnock mine, which is close to Deep River, the 
' rooms and entries are so dry that it is necessary to sprinkle 
them in order to keep down the dust. It is necessary to use 
safety lamps as the coal gives off considerable gas but there 
should be but little trouble to maintain a proper ventilation. 
