990 resultados para Helena Chum
Resumo:
The Golden Messenger Mine which is approximately twenty-three miles northeast of Helena, Montana, near York, on Trout Creek, has long presented several problems of both theoretical and practical interest.
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The purpose of this report is to collect geologic data concerning two Montana talc occurrences at Helena and Ennis and to offer some explanation as to their origin. The two deposits cited are in somewhat similar lithologic settings and both possess the same mineralogical and structural features. Because of this similarity only the Helena deposit is covered in detail.
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Adolph Falk
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Signatur des Originals: S 36/F00787
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Signatur des Originals: S 36/F03739
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Signatur des Originals: S 36/F03740
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Signatur des Originals: S 36/F03741
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Signatur des Originals: S 36/F03742
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Signatur des Originals: S 36/F03743
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Signatur des Originals: S 36/F03744
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Signatur des Originals: S 36/F03745
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Signatur des Originals: S 36/F03746
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Signatur des Originals: S 36/F03747