Underground hard rock mining refers to various underground mining techniques used to excavate hard minerals, usually those containing metals such as ore containing gold, silver, iron, copper, zinc, nickel, tin and lead, but also involves using the same techniques for excavating ores of gems such as diamonds.
You are the one who makes decisions for yourself. You decided to get into mining in the first place. You also make the decisions on how you are going to approach gold mining, and how you are going to deal with all of the problems and the barriers to your success.
Objectives Upon completing the lesson students will be able to: Describe the stages of gold mining in California (i.e. how during the 1850s miners quickly exhausted the easily obtained placer gold deposits and increasingly relied on more sophisticated and expensive mining technology).