Isopach maps of the Powder River Basin, Wyoming and Montana.

Bibliographic Details
Corporate Author:	Geological Survey (U.S.)
Other Authors:	Fox, J. E. (James Ellison), 1943-, Higley, Debra K.
Format:	Government Document Map
Language:	English
Published:	[Reston, Va.] : The Survey ; 1996.
Series:	Oil and gas investigations chart ; OC-147-B
Subjects:	Geology > Powder River Basin (Wyo. and Mont.) > Maps.

Description
Item Description:	Includes text, bibliography, borehole logs, 1 figure, and location map (sheet 1). Cartographic material.
Physical Description:	15 maps on 3 sheets ; 44 x 44 cm., sheets 99 x 112 cm. and 105 x 143 cm. and 105 x 144 cm., folded in envelope 30 x 24 cm.