Results: 1 - 5 of 5
Dec 31, 1969
Earth Sciences Report
… … Eighteen samples of quartzose sand were collected from dune … washed, and analyzed for silica, iron, calcium and … of window glass. The limits of silica and iron contents after …
Nov 30, 2002
Geo-Note
… organic acids, radionuclides, silica, C1, Br and I; 4) quality …
Jan 23, 2020
Data
… sulphate, marl, tufa, phosphate, silica sand, pumicite, sulphur, fly ash, humalite, and sand and gravel. This dataset is …
Jan 23, 2020
Data
… coal, peat, humalite, and sand and gravel, as well as … rare earth elements, salt, sand/gravel, silica sand, silver, stone, …
Dec 31, 1982
Open File Report
… Phosphate Rock, Potash, Salt, Sand and Gravel, Sandstone-Siltstone, Silica Sand, Silver, Sodium Sulphate, …