Coal exploratory holes drilled in 1978-79 in the Birney 1 degree by .5 degrees quadrangle, Big Horn and Rosebud counties, Montana, for coal beds in the Tongue River member of the Paleocene Fort Union Formation
Keyword(s):
1983 ◽
Keyword(s):
1990 ◽
Keyword(s):
1986 ◽
Keyword(s):