Results: 1 - 9 of 9
Apr 30, 1974
Open File Report
… beneath a substantial cover of overburden, where the iron bed was … 50-foot thickness of clay till overburden to expose the iron bed, …
Dec 31, 1986
Earth Sciences Report
… accessible and are under thick overburden. The maximum in situ …
Jan 23, 2020
Data
… location, aerial extent, overburden depth, diamond content, …
Oct 25, 2018
Report
… (SV) come from estimates of the overburden pressures obtained by …
Aug 08, 2016
Data
Dec 31, 1974
Economic Geology Report
… high grit content, or thick overburden reduce the desirability …
Jan 31, 2006
Geo-Note
… covered by as little as 7 m of overburden composed largely of …
Dec 31, 1979
Open File Report
… because of the large overburden thickness. Near-surface …
Dec 31, 1979
Economic Geology Report
… Exploitation is uncertain as overburden is thick in many …