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Place
- North America17
- USA15
- Arizona6
- California6
- no data5
- Maricopa3
- At Picacho Pass northwest of Tucson along Interstate 102
- Mexico2
- New Mexico2
- No data2
- Pinal2
- Riverside2
- Chihuahua1
- DeKalb1
- Georgia1
- Los Angeles1
- North of Albuquerque on road to Placitas1
- Pima1
- Saguaro National Monument Tuscon Mt. Sect., northwest of Tuscon1
- San Gabriel Mt.1