据目前研究认为;二迭——三迭纪时期,北面劳亚古陆和南面冈瓦纳古陆之间横亘着一条近东西向的楔形大洋,命名为古特提斯;约在三迭纪末到侏罗纪陆续关闭。从侏罗到白垩纪,在与其大致相当的位置,同样出现过一个大洋,则称之谓特提斯或新特提斯,大约在始新世到渐新世闭合。自白垩纪到现在,一般认为是目前的地中海。在上述范围内,这些大洋相继产生乃至先后消失,不少作者认为是冈瓦纳古陆北缘分裂的一组微大陆向北漂移和碰撞的结果。即前一大洋缩小和消失的过程,同时也是后一大洋产生和扩大的过程。据 Stockln~i According to the present research, there is a nearly westerly wedge-shaped ocean between Laurasian and Gondwanaland in the north of the Permian-Triassic period, named Gut Tethys; The end to the Jurassic gradually closed. From the Jurassic to the Cretaceous, at roughly the same position there appeared an ocean, which was called Tethys or Neo-Tethyan, and closed around Eocene to Oligocene. From the Cretaceous to the present, generally considered to be the present Mediterranean. Within the above ranges, these oceans have successively disappeared or disappeared, and many authors think that the result of a series of micro-continents moving north and colliding with the northern margin of the Gondwana paleo-continental margin. That is, the process of narrowing and disappearing of the previous ocean and the generation and expansion of the latter ocean at the same time. According to Stockln ~ i