Explain how hard rock mining works.

exploration, extraction, and beneficiation. Exploration involves locating and evaluating a suitable ore. Several mineral exploration methods are: ... Drilling is typically undertaken if geologic conditions are promising and surface sampling indicates a possible ore body.

Explanation:

ard rock mining requires removing ore from other substances such as quartz. Ores have different qualities and impurities depending on how they were formed. Often gold occurs as veins in quartz, which is mined as rocks from within a mine. This requires special machinery and often requires the skills of a geologist.

in 550 b.c.e. cyrus the great, the leader of the persians, conquered the medes and united the iranian people under one ruler for the first time. cyrus became the first king of the persian empire and went on to establish one of the largest empires in world.

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explanation: