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Your Backyard Geology (Column)

The Tintina Trench

There was a not-so-urban myth out there that you could see the Tintina Trench from the moon. That is not true, unless the person on the moon had a good telescope. You can see the Tintina Trench from space, though, from the...

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Carmacks agate

Quartz is everywhere; it is the second most common mineral making up the Earth’s crust, just behind feldspar. Quartz is composed of the two elements silicon and oxygen. It has many different forms. Single quartz crystals can be...

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