Caledonian ophiolites, rift volcanics and the Laurentian margin: Constraining the context for subduction initiation in the Iapetus Ocean

Non-technical Abstract
Earth’s solid outer layer is made up of either continental or oceanic crust. In Earth’s past, the continents had different arrangements to what we are familiar with today. The theory of plate tectonics, which emerged in the 1960s and was formalized in the 1970s, explains the changing face of Earth in terms of the opening…