Ignatius Donnelly’s Ragnarok: The Age of Fire and Gravel argues that the Drift, the sheet of clay, sand, gravel, and scratched stones on the stratified rocks, was not made by waves, icebergs, glaciers, or a continental ice-sheet. A comet struck, or swept the earth with its tail. He reads the heat, the fire, the fall of gravel, the cave-life, the long darkness, and the return of the sun in the myths. He dates the Drift about thirty thousand years ago, from the recession of Niagara, and Noah’s Deluge somewhere from eight to eleven thousand years ago.
In this book the island where he thinks mankind survived is Atlantis, west of Europe and east of America, the Azores its mountain-tops, the ridges the bridge Bifrost. He says that here. I do not carry over claims from his earlier book except where this one repeats them.