Geology topics
George H. Ashley
Publications and source records attributed to George H. Ashley.
Introduction. Stratigraphy and coal beds of the Indiana coal field. The Washburne lignite field, North Dakota. The Fort Berthold Indian Reservation lignite field, North Dakota. The Fort Peck Indian Reservation lignite field, Montana. The central part of the Bull Mountain coal field, Montana. The Milk River coal field, Montana. Notes on the coals of the Custer National Forest, Montana
No abstract available.
Bulletin↗
The valuation of public coal lands: The value of coal land; Depth and minimum thickness of beds as limiting factors in valuation
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Bulletin↗
Ditney folio, Indiana
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Folios of the Geologic Atlas↗