Maillard Ranch (2), San Geronimo, Marin Co., California, USA
A Mn occurrence located 2.4 km (7,800 feet) ESE of San Geronimo, ½ mile S of Woodacre, 8 miles NW of San Rafael.
ReferencesBradley, W.W., et al (1918), Manganese and chromium in California: California Mining Bureau. Bulletin 76: 39.
Jenkins, Olaf Pitt (1943), Manganese in California: California Division of Mines Bulletin 125, 387 pp.: 131.
Trask, Parker Davies (1950) Geologic description of the manganese deposits of California. California Division of Mines Bulletin 152, 378 pp.: 106.
California Journal of Mines and Geology (1955): 51(3)(July): 282, Pl. 4.
Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 298.
1 entry listed.
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