Even the few good actors in this movie couldn't save the abysmal script.
The concept of 'suspension of disbelief', such as the existence of pterodactyls ... in a cold weather climate!? ... still requires people to act quasi-intelligently. Darwin would have made sure half these people would have never made it to adulthood.
And really, you couldn't have waited 6 months to make this during warm weather to make it just slightly believable?
For a low budget film, the special affects were not bad. The locations and photography were pretty good to. And I was rather pleased with the direction in general. But spend an extra day or two on the script and add a little realism to the actors actions, and get rid of a few of the weaker links.