Geologic map of the Wagon Wheel Gap fluorspar district, Colorado
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Open-File Report↗
Geology topics
T. A. Steven
Publications and source records attributed to T. A. Steven.
Critical review of the San Juan peneplain, southwestern Colorado
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Professional Paper↗
Ash flows and related volcanic rocks associated with the Creede Caldera, San Juan Mountains, Colorado
No abstract available.
Colorado↗
Metamorphism and the origin of granitic rocks, Northgate district, Colorado
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Professional Paper↗
Geology of the Northgate fluorspar district, Colorado
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Miscellaneous Field Studies Map↗
Geologic map of the Summitville mining district of Colorado
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Open-File Report↗
South Dakota mica deposits
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Open-File Report↗
South Dakota mica deposits
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Open-File Report↗