article: Iapetus Ocean
links: Atlantic Ocean Pangaea River Shannon Palaeozoic Permian Lindisfarne Newfoundland and Labrador Great Britain British Isles New Brunswick United States New Hampshire Isle of Man Neoproterozoic Caledonian orogeny Canada Charles Doolittle Walcott Scotland County Louth Ireland Euramerica Laurussia Devonian Old Red Sandstone Massachusetts Maine Newfoundland Connecticut