Ignatius Donnelly. Ragnarok: The Age of Fire and Gravel. New York, D. Appleton and Company, 1883 — Source.
An interesting book about geological drift, or the movement of rocks and sediment across the earth.
The Art of Book Design: Ragnarok the Age of Fire and G(r)avel
“Gravel”. Though the image of Thor as a judge using Mjolnir to demand order is pretty great.
abbeycadabra
Thanks. I’ve fixed it…sort of. Your comment is brilliant.