Photographed by Michael P. Klimetz
Lignite
Paleocene
Sentinel Butte Formation
Center
NORTH DAKOTA
Photographed by Michael P. Klimetz
Photographed by Michael P. Klimetz
Photographed by Michael P. Klimetz
Photographed by Michael P. Klimetz
Bituminous
Cretaceous
Blackhawk Formation
UFCO (Southern Utah Fuel Company) Mine
Salina
Wasatch Plateau
UTAH
Photographed by Michael P. Klimetz
Bituminous
Pennsylvanian
Llewellyn Formation
Reading Coal Company
St. Claire
Schyulkill County
PENNSYLVANIA
Photographed by Michael P. Klimetz
Bituminous
Pennsylvanian
Llewellyn Formation
Reading Coal Company
St. Claire
Schyulkill County
PENNSYLVANIA
Photographed by Michael P. Klimetz
Bituminous
Hohenpeißenberg
Bavaria
GERMANY
Photographed by Michael P. Klimetz
Bituminous
Hohenpeißenberg
Bavaria
GERMANY
Photographed by Michael P. Klimetz
Bituminous
Hohenpeißenberg
Bavaria
GERMANY
Photographed by Michael P. Klimetz
Bituminous
Hohenpeißenberg
Bavaria
GERMANY
