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Nahcolite from
Anvil Points, Rifle, Garfield Co., Colorado, USA


Description
Quality of samples:not specified / average specimens
Confirmation
Validity:Believed Valid
References
References:Ertle (1947) American Mineralogist: 32: 117; Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 135.
Comments
Occurs as concretions to 5 feet (1.5 meters) in diameter in oil shale of the Eocene Green River formation.
Mineral and/or Locality
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