Results: 1 - 3 of 3
Dec 31, 1975
Earth Sciences Report
… Group strata contain the largest reserves, with 628,000 million tons …
Dec 31, 1967
Bulletin
… flow. The natural basin (dynamic reserves) is estimated to be 1.35 …
Dec 31, 1975
Open File Report
… horizon. Horseshoe Canyon coal reserves between the depths of 300 …