Sulphur Bank Mineとは 意味・読み方・使い方

The Sulphur Bank Mine is located near Clearlake Oaks, California. The 150-acre (0.61 km²) mine became one of the most noted mercury producers in the world. Beginning in 1856, the mine was first worked for borax. Mining for sulfur began in 1865, and produced 2,000,000 pounds (909,090 kg) in four years. Mercury ore was mined intermittently by underground and open-pit methods from 1873 to 1957 and Sulphur Bank Mine is credited with total output of 92,400 flasks (7.02 million pounds) by 1918. The mine was an important producer during both world wars.