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| | Mineralogical Record: North Geronimo mine, La Paz County, Arizona, The |
 | | Arizona's most famous vanadinite occurrences include the Apache mine in Gila County (Wilson, 1971), the Old Yuma mine in Pima County (Jones,1983), the J. Holmes claim in Santa Cruz County (Novak and Besse, 1986), and the Mammoth-St. Anthony mine in Pinal County (Bideaux,1980). |
 | | Access is by way of Yuma, Arizona, proceeding north for 16 miles on U.S. Highway 95 to the Martinez Lake turnoff, then west 10.2 miles on a paved road to a point just past the Yuma Proving Grounds Airfield. |
 | | It should be noted for labeling purposes that the entire district, originally located in Yuma County, has since 1982 been part of the newly formed La Paz County. |
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