1. Why did the geologist marry the rock? Because he wanted to settle down.
2. Why didn't the geologist want to go to a movie with the archaeologist? Because she said it would be a grind.
3. Why did the geologist break up with the paleontologist? Because he said her taste in men was prehistoric.
4. What did the geologist say when he saw a meteor? Not on my watch!
5. Why did the geologist get a divorce? Because his wife was too metamorphic.