What opposing theories a catastrophist and a gradualist might have.

A catastrophist may disagree with a gradualist about how the dinosaurs went extinct. A catastrophist might argue that no sooner had the asteroid hit earth than all these reptile like animals died. He might claim that the impact was hard enough to cause different disasters all around the planet. At the same time a gradualist could suggest that the dying of dinosaurs must have been the result of lack of food and suitable environment that slowly killed any chance of survival for these animals.