Pangaea believed to be the main cause of the shrinking of lysocline areas. The third cause of this extinction event that can be attributed to northern Pangaea is the beginnings of anoxic ocean environments, or oceans with very low oxygen concentrations. The mix of anoxic oceans and ocean acidification due to metal loading led to increasingly acidic oceans, which ultimately led to the extinction of benthic species. Pangaea Pangaea or Pangea () was a supercontinent that existed during the late Paleozoic and early Mesozoic eras. It assembled from earlier continental units approximately 335 million years ago, and it began to break
Gondwana (India) Gondwana (India) Gondwana is a region of India, named after the Gondi people who live there (though they can also be found in other parts of India). The name of the ancient continent of Gondwanaland was derived from Gondwana, because some of the earliest rock formations of this continent were first investigated in part of the region, in modern Odisha. As Gondi people are spread widely across central India, and are a minority almost everywhere, there is no unambiguous boundary to the region. However, the core region can be considered to be the eastern part of the Vidarbha region of