Aside from coal, Black Diamond Mines Preserve also shares the areas extensive sand mining history. In 1920, Marvin Greathouse, president of G. and M. Gravel company, opened the Hazel Atlas Mine ...
Antioch's Black Diamond Mines Regional Preserve offers visitors a unique opportunity to learn about California's rich mining history.
Some results have been hidden because they may be inaccessible to you
Show inaccessible results
Feedback