Geology of the Alps (300 Ma), the Hercynian or Variscan orogeny, in which the supercontinent Pangaea formed from Gondwana and Laurasia, was ended. East of the terranes that now form the Alps was the Paleo-Tethys Ocean. The effects of wind and water were able to chemically and mechanically erode and destroy the Hercynic mountain ranges. In the Permian, the main deposits in Europe were sandstone and conglomerate, products of erosion in the Hercynic mountain range. At the same time, crustal extension took place because the mountain range was isostatically unstable (this is called orogenic collapse). Due to extension, basins formed along the axis of
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