During the Middle Ordovician period of the Taconic orogeny, volcanic island arcs collided with the eastern coast of North America, causing extensive metamorphism, faulting, and uplift. The result of these processes were the Taconic Mountains, located along the border of New York and New England. After the Taconic orogeny, the Humber seaway was on its way to closure; at the same time, the Dashwoods microcontinent accreted to Laurentia. This then led to the accretion of oceanic terranes including the Bay of Islands in Newfoundland and Thetford Mines Ophiolites in Quebec. Additionally, the Late Ordovician-Early Silurian mélange was present, which consisted of blueschists and deepwater deposits. These blueschists and deepwater deposits indicate that subduction continued during this period of time.