Possible? Sure, why not? A meteor could have just clipped a glacier. Bu't I don't think that's very likely, and I don't think there would be much left in the way of DNA. It tends to decay over time. Your dino meat would have be be encased in enough material to protect it from radiation and be in an orbit that would keep it at very low temperature. Most improbable. But then, if you want some dinosaur DNA, don't worry. The aliens who took them plan to return them any day now.