"Valley of Bones" is a short, eye-catching title for a film that seeks to be action-adventure but goes wide and ends short of the mark. Not a bad idea for a movie, just a premise that could not be believably sustained by the author and director. Female paleontologist with a criminal past and a young son she is raising with her father gets wind of a potential dinosaur find on a remote ranch which the audience and one other character know to be a scene of drug-running violence. Apparently the drug cartel thinks it can profit from a heap of dug up fossils, too.
So much is not how things are really done in the real world of pre-historic fieldwork. Fossils are not bones. Major finds are not worked by a couple of folks with shovels who can extract them over lunch. Most junkies are not good at taking down barflies.
It's not the sketchy characters, it's the sketchy story and the plotholes and timing problems.
BTW, Mark Margolis pays a visit from 'Better Call Saul'. Why? I'm thinking he lost a bet.