Geologic map of the Banta Ridge Quadrangle, Rio Blanco County, Colorado
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Miscellaneous Field Studies Map↗
Geology topics
L.J. Schmitt
Publications and source records attributed to L.J. Schmitt.
Geologic map of the De Beque Quadrangle, Garfield and Mesa counties, Colorado
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Miscellaneous Field Studies Map↗
Map showing the areal distribution of oil shales with associated mineral resources and metal anomalies in the Western United States and Alaska
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Miscellaneous Field Studies Map↗
Annotated bibliography of potential oil shales of the Western United States exclusive of the Green River Formation
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Open-File Report↗
Selected bibliography on the association of petroliferous and non-petroliferous organic materials with uranium and other metal deposits in sedimentary rocks
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Open-File Report↗
Petrographic study of sandstones from measured sections of the Morrison Formation and related units, southwestern San Juan Basin, New Mexico
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Open-File Report↗
Geologic map of the Brenton Springs Quadrangle, Fremont and Sweetwater counties, Wyoming
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Miscellaneous Field Studies Map↗
Geology and mineral deposits of the Needle Mountains District, Southwestern Colorado
The Needle Mountains district is set in highly fractured Precambrian granitic rocks that have intruded and metamorphosed older Precambrian metasedimentary rocks. The Precambrian rocks are overlain by outliers of Paleozoic strata and intruded by a late Tertiary stock. Past mineral production reportedly was limited to silver and gold ores presumably taken from small fissure veins. Although the economic potential of the district has not been adequately explored, some evidence indicates potential for base metal deposits.
Colorado↗
Mineral resources of the San Juan primitive area, Colorado, with a section on iron resources in the Irving Formation
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Bulletin↗