Actual Tar PitsEdit
The real life tar pits are actually a "death trap" for any animals that mistake it for a body of water or the corpse of an animal as a so-called "easy lunch"(called a predator trap) because the asphault forms a black, sticky liquid that is thick enough to trap even mammoths into it's relentles grip and kill them eventually. Then said victim would be added to it's collection of skeletons and can be used as bait so that the carnivores would fall for it's attractions and end of trapping itself mistakenly. The most famous tar pits are the Le Brea tar pits of LA. It is debatable if tar pits really existed during the times of the dinosaurs because evidence shows of pits of very thick, sticky mud that would do the exact same thing to the dinosaurs, such as the Cleveland Dinosaur Quarry & the Gobi Desert dinosaur death traps. It is strange that the player's dinosaur is able to safely walk in the tar pits while the Braichosaurus and Diplodocus are seen trapped by them.