Excel Mineral Mine and Millsite

USA / California / Maricopa /

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Mining began here in 1949. The crushed opal sedimentary clay deposits were originally used to absorb oil and grease, but it wasn't until a friend talked to mine owner John Alan Stephens that the deposits were used for another, more well-known purpose: Jonny Cat litter.

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www.mindat.org/loc-79982.html

Nearby cities:

Coordinates: 35°3'10"N 119°26'58"W

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