Mount Antero, at 14,275ft high, is one of the few Fourteeners in Colorado you can drive to the summit of. It is also one of the highest mountain roads of Colorado. Featured on the Weather Channel's show Prospectors, I drove down to Buena Vista and headed up Baldwin Gulch Road (County Road 277) in search of minerals. Mount Antero has one of the highest concentrations of aquamarine in the country!
The mountain is part of the Mt. Princeton Batholith composed of quartz and granite monzonite. According to minedat, "The granite is composed of oligoclase, orthoclase, quartz and minor amounts of hornblende and biotite. The monzonite consists of andesine, orthoclase, quartz, hornblende, and some sphene, apatite and iron oxides. The included pegmatites contain crystals of microcline and quartz, and secondary hydrothermal minerals such as beryl (aquamarine), phenakite, albite, bertrandite, and fluorite" ("Mt Antero, Chaffee Co., Colorado, USA," n.d.)
References
Mt Antero, Chaffee Co., Colorado, USA. (n.d.). Retrieved from https://www.mindat.org/loc-3597.html
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