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USGS Frequently Asked Questions
FAQ's about Geology
How large is a lifetime supply of minerals for the average person?
My uncle's house was swallowed up by a sinkhole! What happened?
How do we get minerals?
How many pounds of minerals are required by the average person in a year?
What is the meaning of the karat mark on gold jewelry?
What is a mineral?
Is there evidence for a cause and effect relationship between eruptions that occur at about the same time from volcanoes located hundreds to thousands of km apart?
Is it dangerous to work on volcanoes and what precautions do scientists take?
Can an eruption at one volcano trigger an eruption at another nearby volcano (for example, within about 10 km)?
How much copper has been found in the world?
Do minerals produce the colors in fireworks?
What instruments, tools, and methods do you use to study volcanoes?
What kind of school training do you need to become a volcanologist?
What is pewter?
What volcanoes in the conterminous United States have erupted since the Nation was founded?
Is there a relationship between large earthquakes (>M 6) that occur along major fault zones and nearby volcanic eruptions?
How much silver has been found in the world?
How much gold has been found in the world?
What is "Fool's Gold"?
What's the difference between a rock and a mineral?
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U.S. Geological Survey