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Acme Cement Plaster Company workings (Navajo Gypsum & Fertilizer), Winslow, Navajo Co., Arizona, USA

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Detailed Mineral List:

Gypsum
Formula:	CaSO₄ · 2H₂O
Description:	As a bed 4 inches to 4 feet thick, avg. 18 inches.
Reference:	Galbraith, F.W. & Brennan (1959), Minerals of AZ: 60.






Gypsum var: Selenite
Description:	Mined as large plates in upper member Permian Supai Formation.
Reference:	Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 242; Peirce, H.W. & T.A. Gerrard (1966), Evaporite deposits of the Permian Holbrook Basin, AZ, 2nd. Symposium on Salt. Northern Ohio Geological Soc., Inc. 1: 1-10; Stone, R.W. (1920), Gypsum deposits of the US, USGS Bull. 697: 51; Galbraith, F.W. & Brennan (1959), Minerals of AZ: 60.

2 entries listed. 1 valid mineral.

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Copyright © Jolyon Ralph and Ida Chau 1993-2011. Jobs in Arizona, USA Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 23rd May 2011 13:50:26