My dog has black gunk in her right ear. What in the world is it?

possible infection or ear mites its best to big your dog to a vet and get it checked out until then pick up a ear cleaner at the petstore and some cotton and gentely clean her ears i have seen this alot working at a grooming salon if its really bad she might get a little upset when you try to clean them but give it a try everyday until you can get her to a vet and after that you might want to get a second vet to check it out to make sure that is the problem