It began breaking up during the Jurassic period, forming continents Gondwanaland and Laurasia , separated by the Tethys Sea. Pele's hair Pele's hair is a Hawaiian term for natural spun glass that can be as much as 2 m long. It is formed from the fountaining of fluid basaltic lava, cascading lava falls, or from turbulent lava flows. The period is the basic unit of geological time in which a single type of rock system is formed, lasting tens of millions of years. It ended with the largest mass extinction and was followed by the Mesozoic Era.
Ancient sharks swam the seas during the Permian period.
The crust of the Earth is broken into plates . The plates are enormous chunks of rock that float atop the soft mantle. The plates are moving at a speed that has been estimated at 1 to 10 cm per year. It has a flat base and a convex upper surface. It is the time from when the Earth formed until simple life-forms evolved.