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The strongest recorded earthquake was magnitude 9.5

The largest earthquake recorded since 1900 struck Chile on May 22, 1960, at magnitude 9.5.

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It is known as the Valdivia Earthquake. The second largest was the magnitude 9.2 Great Alaska Earthquake of 1964.

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Open U.S. Geological Survey

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Some beach sand is parrotfish poop

Parrotfish grind up coral reef material in their guts and excrete it as sand.

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Ocean pressure rises with every 33 feet of depth

For every 33 feet you go down in the ocean, the pressure increases by one atmosphere.

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Petrified wood is almost solid quartz

The petrified wood of Petrified Forest National Park is made up of almost solid quartz.

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