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Labradorite from
Black Mountain, Sierrita Mts, San Xavier (Tohono O'odom) Indian Reservation, Pima Co., Arizona, USA

Description
Comments:Plagioclase in the andesine-labradorite range. Phenocrysts to 2 inches in intrusive & flow porphyritic rocks, locally termed 'Turkey Track' porphyry.
Quality of samples:not specified / average specimens
Confirmation
Validity:Believed Valid
References
References:Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 329-330; Cooper, J.R. (1961), Turkey-track porphyry - A possible guide for correlation of iocene rocks in southeastern AZ, AZ Geol. Soc. Digest: 4: 17-35.
Data
Mineral Data:Click here to view Labradorite data
Locality Data:Click here to view Black Mountain, Sierrita Mts, San Xavier (Tohono O'odom) Indian Reservation, Pima Co., Arizona, USA
Mineral and/or Locality
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