Showing posts with the label around 1.1 billion years ago

Lake Superior Agates are formed from volcanic rocks that solidified around 1.1 billion years ago

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Lake Superior Agates are formed from volcanic rocks that solidified around 1.1 billion years ago These volcanic rocks were composed of silica-rich lava that eventually cooled and solidifi…
Lake Superior Agates are formed from volcanic rocks that solidified around 1.1 billion years ago
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