For more like this subscribe to the Open University channel / @openlearn_ou Free learning from The Open University http://www.open.edu/openlearn/science... --- Explore the variety of rock types in this geological excursion along the Causeway Coast. (Part 4 of 9) Playlist link - • Rocks in the Field --- For more information about metamorphism of rocks visit http://www3.open.ac.uk/study/undergra...