Colstrip Coalfield, Powder River Basin, Montana: Geology, Coal Quality, and Coal Resources
http://geology.cr.usgs.gov/energy/coal/PP1625A/Chapters/PC.pdf

S.B Roberts, E.M Wilde, G.S. Rossi, D. Blake, L.R. Bader, M.S. Ellis, G.D. Stricker, G.L. Gunther, A.M. Ochs, S.A. Kinney, J.H. Schuenemeyer, H.C. Power, USGS


This 41-page PDF provides information about the Colstrip Coalfield in the Powder River Basin, Montana. Topics covered include geology, coal quality, and coal resources. Maps, tables and figures illustrate the text.

This resource is referenced here:
Subject: Geoscience:Geology:Sedimentary Geology, Environmental Science:Energy:Fossil Fuels,
Resource Type: Scientific Resources:Overview/Reference Work
Topics: Solid Earth, Earth surface:Sedimentary Geology