In the Early Jurassic period the continents were still clustered around the equator roughly in the shape of a “C” that bordered the Tethys Sea. However, unlike the Triassic period, in which the continents were all part of one giant landmass known as Pangea, a split formed during the Jurassic period that divided Pangea into two large landmasses. The most accepted theory for the breakup of the supercontinent Pangea is the action of plate tectonics, causing a spreading rift split the “C” shape of Pangea into two large, separate landmasses.