Print this pageAbstract: Recent Developments in Coal Exploration in Southeastern Montana and Northeastern Wyoming
Robert E. Matson, John Pinchock
Review of recent coal exploration in the Tongue River Member of the Fort Union Formation and the Wasatch Formation in the 
Decker
, Hanging Woman Creek, and Moorhead, Montana, areas and the Spotted Horse, Gillette, and Rochelle Hills, Wyoming, areas indicates that the Tongue River Member coal in the Decker
area has the highest rank of any coal in the Powder River basin.
Proper evaluation of coal resources requires utilization of shallow drilling with geophysical logging of drill holes. This information supplements available subsurface data such as oil-well logs. Many oil-well logs are useful in coal evaluation, particularly if gamma-ray logs have been run to the surface.
Coal sections in the Powder River basin of southeastern Montana and northeastern Wyoming are correlatable, and the coal bed names have been standardized, although some problems still exist.
AAPG Search and Discovery Article #90971©1976 AAPG-SEPM Rocky Mountain Sections 25th Annual Meeting, Billings, Montana