Bonanza Mine (Little Bonanza Mine; Fairview Mine), Gold Hill, Sonora, Sonora District, East Belt, Tuolumne Co., California, USA
|Latitude & Longitude (WGS84):||37° 59' 8'' North , 120° 23' 2'' West|
|Latitude & Longitude (decimal):||37.98556,-120.38389|
A former lode Au mine located at Gold Hill at the N end of Sonora, within the city limits. The claim is acres at the head of Washington Street.
Mineralization is hosted in limestone and mica schist.
4 valid minerals.
This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.
Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org
|Triassic - Ordovician|
201.3 - 485.4 Ma
|Paleozoic marine rocks, undivided, unit 4 (Western Sierra Nevada)|
Age: Phanerozoic (201.3 - 485.4 Ma)
Stratigraphic Name: Calaveras Complex (part); Shoo Fly Complex (part); Blue Canyon Formation; Briceburg Formation; Cape Horn Slate; Delhi Formation; Hite Cove Formation; Kanaka Formation; Relief Quartzite; Tightner Formation
Comments: Western Sierra Nevada. Lower Paleozoic Shoo Fly Complex and upper Paleozoic to lower Mesozoic Calaveras Complex, undivided. Deformed and metamorphosed rocks composed primarily of quartzite, argillite, and chert; includes melange
Reference: Horton, J.D., C.A. San Juan, and D.B. Stoeser. The State Geologic Map Compilation (SGMC) geodatabase of the conterminous United States. doi: 10.3133/ds1052. U.S. Geological Survey Data Series 1052. 
Tucker, W. Burling (1914), Tuolumne County: California Mines Bureau Report 14: 141.
Logan, Clarence August (1949), Mines and mineral resources of Tuolumne County, California: California Journal of Mines and Geology: 45(1): 60.
Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 61, 219, 287.