A Study of Sandstone Members of the Jefferson City and Cotter Formations at Rolla, Missouri

Grawe, Oliver R.; Cullison, James Shelley

doi:10.1086/623844

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Part II1

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1935

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“…A method of recording the actual numerical counts of the heavy constituents of a formation has also been used (9). This scheme is free from the defects which have been ascribed to the other methods, but similarities between samples are often obscured by general fluctuations of the entire heavy mineral crop.…”

Section: Part IImentioning

confidence: 99%

Some Suggestions for Heavy Mineral Investigations of Sediments

Cogen¹

1935

SEPM JSR

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Attention is directed to the variability in quantitative relations between heavy minerals as a consequence of changes in the texture of sediments. It is suggested that for quantitative comparisons of heavy minerals, materials of the same grade-size should be utilized.Various methods in use for describing quantitative re[ations between heavy minerals are critically analysed. A new method of representation is suggested. A standard or type sample is selected. It is screened and the heavy minerals are separated from the suitable grade-size fractions. A known portion of the heavy mineral crop is counted and the abundance of each mineral species is established for a definite weight of uniformly sized material. The abundance of any mineral species in other samples is then given by a comparison with this standard.

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Section: Part IImentioning

confidence: 99%

Some Suggestions for Heavy Mineral Investigations of Sediments

Cogen¹

1935

SEPM JSR

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show abstract

A Study of Sandstone Members of the Jefferson City and Cotter Formations at Rolla, Missouri

Cited by 1 publication

References 0 publications

Some Suggestions for Heavy Mineral Investigations of Sediments

Some Suggestions for Heavy Mineral Investigations of Sediments

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