The term Frontier is usually just thought of as an international border, but in figurative speech the term can be much more lose as, for example, the subject of exploration. This is how the topic of this page featuring a few of Carl Barks' frontier stories is meant to be read. They are divided into 4 widely different types of frontiers: Wild West (the pioneer frontier), Exploration (the challenging frontier), Ocean (the unexplored frontier), and Outer Space (the final frontier), and Barks made numerous stories which fit into these categories. The sub-pages offer, in chronological order, 10 diverse examples from each group.