Wait for another glacier to take ’em away again

From A treasury of American anecdotes; sly, salty, shaggy stories of heroes and hellions, beguilers and buffoons, spellbinders and scapegoats, gagsters and gossips, from the grassroots and sidewalks of America by Benjamin Albert Botkin.  

[A] Maine farmer . . . was asked by a summer visitor how there happened to be so many rocks on his farm. “Glacier brought ’em,” he said. What was he going to do about it? the summer visitor asked. “Wait for another glacier to take ’em away again,” he said.