ered through what may be termed
the Rocky Mountain Region, extending from Montana to New Orleans. A
partial list of these fields and their location follows:

Judith Basin Central Montana
Bull Mountain Field Central Montana
Yellowstone Region Southwestern Montana
Big Horn Basin Region Southern Montana
Big Horn Basin Region Northern Wyoming
Black Hills Region Northeastern Wyoming
Hanna Field Southern Wyoming
Green River Region Southwestern Wyoming
Yampa Field Northwestern Colorado
North Park Field Northern Colorado
Denver Region North Central Colorado
Uinta Region Western Colorado
Uinta Region Eastern Utah
Southwestern Region Southwestern Utah
Raton Mountain Region Southern Colorado
Raton Mountain Region Northern New Mexico
San Juan River Region Northwestern New Mexico
Capitan Field Southern New Mexico

Along the Pacific Coast a few small fields are scattered in western
California, southwestern Oregon, western and northwestern Washington.

Most of the coals in the above fields are on the border line between
bituminous and lignite. They are really a low grade of bituminous coal
and are known as sub-bituminous or black lignites.

Lignites--These resemble the brown coals of Europe and are found in the
western states, Wyoming, New Mexico, Arizona, Utah, Montana, North
Dakota, Nevada, California, Oregon and Washington. Many of the fields
given as those containing bituminous coals in the western states also
contain true lignite. Lignite is also found in the eastern part of Texas
and in Oklahoma.

Alaska Coals--Coal has been found in Alaska and undoubtedly is of great
value, though the extent and character of the fields have probably been
exaggerated. Great quantities of lignite are known to exist, and in
quality the coal ranges in character from lignite to anthracite. There
are at present, however, only two fields of high-grade coals known,
these being the Bering River Field, near Controllers Bay, and the
Matanuska Field, at the head of Cooks Inlet. Both of these fields are
known to contain both anthracite and high-grade bituminous coals, though
as yet they cannot be said to have been opened up.

Weathering of Coal--The storage of coal has become within the last few
years to a certain extent a necessity due to market conditions, danger
of labor dif