A Mn occurrence near Palo Verde (Imperial County) in Riverside County.
References:
Bradley, W.W., et al (1918), Manganese and chromium in California: California Mining Bureau. Bulletin 76: 54-59.
Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 298.
Mineral List:1 entry listed.
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