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Unnamed Mn occurrence (1), Jumpoff Creek, McClure Place, Coastal Range, Mendocino Co., California, USA

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A Mn occurrence located 3.8 km (2.3 miles) ENE of McClure Place.

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The above list contains all mineral locality references listed on This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.


Trask, Parker Davies, Ivan F. Wilson & F.S. Simons (1943), Manganese deposits of California – a summary report: California Division Mines Bulletin 125: 136.

Trask, Parker Davies (1950) Geologic description of the manganese deposits of California. California Division of Mines Bulletin 152, 378 pp.: 126.

O’Brien, J.C. (1953), Mines and mineral resources of Mendocino County, California: California Journal of Mines and Geology (Report 49): 49(4): 387.

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