Geology topics
T. M. Billings
Publications and source records attributed to T. M. Billings.
Map showing distribution pattern of tin from samples of the nonmagnetic fraction of heavy-mineral concentrates, northern Sonora, Mexico
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Open-File Report↗
Map showing distribution pattern of molybdenum from samples of the nonmagnetic fraction of heavy-mineral concentrates, northern Sonora, Mexico
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Open-File Report↗
Map showing distribution pattern of copper from samples of -80 mesh stream sediment, northern Sonora, Mexico
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Open-File Report↗
A listing and statistical summary of spectrographic analyses of heavy mineral concentrate samples for the Philip Smith Mountains Quadrangle, Alaska
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Open-File Report↗
Geochemical distribution of selected metals, Coeur d'Alene District, Idaho
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Open-File Report↗