The mine was pegmatite is 1.4 billion years old and produced "scrap mica between 1954 and 1965". Explorers can find mica books and large quartz crystals in the area. Beryl and garnet occur as accessories. Stop 1 in Daniel et al
References
Page 218 - Daniel, C. G. et al., 2016, Regional Al2SiO5 triple-point metamorphic rocks of northern New Mexico: A field trip to honor the career contributions of Lincoln Hollister to petrology and tectonics: Geol. Soc. Am. Field Guide 44, p. 201- 229.
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