http://www.theonion.com/articles/geologists-we-may-be-slowly-running-out-of-rocks,17341/
"Think about it. When was the last time you even saw a boulder?"
Meanwhile in Finland:
Today, around one hour ago, while finding rocks to displace from their natural habitat and replace on my balcony, I saw at least 20 larger-than-me-sized boulders laying around.