Pegmatites of the Crystal Mountain district, Larimer County, Colorado
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Bulletin↗
Geology topics
W. R. Thurston
Publications and source records attributed to W. R. Thurston.
Fluorspar deposits of Utah
The studies of fluorspar localities in Utah made by the U. S. Geological Survey during and since the recent war are summarized. The fluorspar at the Cougar Spar and Blue Bell mines in the Indian Peak Range of western Beaver County occurs as fissure veins in fault and breccia zones in volcanic and intrusive rocks. At the Monarch (Staats) claims in west-central Beaver County fluorspar was mined chiefly from a fault between limestone and rhyolite porphyry. The Thomas Range district in Juab County has yielded sizeable tonnages of fluorspar from pipes in faulted dolomite and rhyolite porphyry. From 1918 to 1924 the Silver Queen mine in Tooele County produced fluorspar from flssure veins in faulted limestone. The report describes the geology of producing mines and the various prospects examined. Production and reserves of fluorspar for Utah are summarized.
Utah↗
Preliminary notes on the geology of the Moore Hill fault system, Crittenden and Livingston Counties, Kentucky
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Open-File Report↗
Notes on the geology of the Eva Tanguay fluorspar property, Tabb fault system, Crittenden County, Kentucky
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Open-File Report↗
Preliminary notes on the geology of the Levias fault system, Crittenden County, Kentucky
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Open-File Report↗
Preliminary report on the geology of part of the Babb fault system, Crittenden and Livingston Counties, Kentucky
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Open-File Report↗
Preliminary report on the geology of the Senator mine area, Caldwell county, Kentucky
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Open-File Report↗