Chew, David M., and Cees R. van Staal. “The Ocean – Continent Transition Zones Along the Appalachian – Caledonian Margin of Laurentia: Examples of Large-Scale Hyperextension During the Opening of the Iapetus Ocean”. Geoscience Canada 41, no. 2 (May 7, 2014): 165-185. Accessed October 23, 2019. https://journals.lib.unb.ca/index.php/GC/article/view/21162.