Results: 1 - 4 of 4
Feb 28, 1993
Open File Report
… oxidized form of lignite coal that is rich in humic acids. … their own pits and from a nearby coal mine in the Forestburg area. …
Jul 14, 2014
Data
Dec 31, 1974
Earth Sciences Report
… minor carbonate, thin limestone, coal and tuff beds (Green, 1972). …
Dec 31, 1973
Earth Sciences Report
… bentonitic sandstones and coal seams. Yields are fairly high …