Some Montana Coal Felds. — Rozi'e. 375 
part of the coal mined in this vicinity is coking. The upper 
beds are non-coking, but make a good steam coal. 
Fergus County. 
The Great Falls field also extends down into this county to 
the west of Lewiston, the county seat and the largest town 
without a railroad connection, in the state. 
The Judith Basin field which forms almost a hollow square, 
surrounds Lewiston and lies between the 109th and 110th de- 
grees W. long., and immediately north of the 47th parallel. 
There are several coal mines around Lewiston, and since this 
part of the country has become such a good mining district,, 
much is expected from the coal product. The coal found here 
is semi-bituminous and belongs to the Cretaceous. Lewiston 
is supplied with coal from her own mines. 
Powell County. 
Neocene lignite is found in and around Deer Lodge which 
is the county seat of this county, located in the southern part 
of the county in the Deer Lodge valley. A semi-bituminous 
coal has also been reported as being found near Avon, a small 
town on the Northern Pacific Ry.. north and east of Deer 
Lodge. 
Deer Lodge County. 
During the past year several good mines of semi-bitumin- 
ous or lignite coal have been reported near Anaconda, the coun- 
ty seat of this county. Much development on these mines dur- 
ing the coming season is planned and the exact thickness of the 
beds and the kind of formation will be learned. They, doubtless 
belong to the Neocene period, however. Cretaceous outcrops are 
found near Anaconda. In sinking some of the earlier shafts one 
of the coal seams measured five feet, four inches, and gave the 
following analysis : 
Volatile matter 45 
Fixed Carbon 35 
Ash '. 15 
Moisture 5 
Silver Bow County. 
This county, with Butte as its county seat, and containing 
some of the richest copper mines in the world, has had no coal 
mines reported as far as the writer knows. 
