A northwestern ocean basin system was genetically related to the Atlantic Ocean, opened in Middle to Late Jurassic time, and is known as the Alpine Tethys Ocean, which include multiple branches, such as the Piemonte-Liguria Ocean between Greater Adria (i.e. modern Adria and the its restored portions now folded and thrusted in circum-Adriatic orogens), Iberia, and the Briançonnais continental fragment, and the Valais Ocean between the Briançonnais fragment and Europe