Richard I Gibson | Substack

Richard I Gibson

@richardigibson

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I'm a geologist and historian living in Butte, Montana USA. Author of the History of the Earth Perpetual Calendar, What Things Are Made Of, and Butte Rocks.

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The Geologic Column

The Geologic Column

By Richard I Gibson

Geology newsletter by Richard I. Gibson. Anything about geology, with a focus on minerals and tectonics.

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