Which statement about the discovery of gold and silver deposits in the west in the mid-1800s is not true?

What makes a personal exceptionality/non-exceptionality

During which era in earth's history were the first insects? mesozoic precambrian cenozoic paleozoic

How far is a geographic second? a.) around 100 feet b.) around 1,000 feet c.) around 5,000 feet d.) none of the above