John C. Holden

John C. Holden, often called Jack Holden, is an American geologist, scientific illustrator, and humorist known for his early research into tectonic drift with Robert S. Dietz in the 1960s and 1970s. In 1976 he founded the "International Society to Stop Continental Drift", a tongue-in-cheek organization which attracted hundreds of members and had the motto, "Eschew Sea-Floor Spreading".

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