According to Kober, geosyncline is the base of the formation of mountains. He considered that there were deposits of sediments in Tethys ocean brought by many rivers. When these sediments were subjected to powerful compression due to the northward movement of the Indian plate, this resulted into the folding of sediments. Once, the Indian Plate started plunging below the Eurasian plate, these sediments were folded further and raised and turned into folded mountains.
