Note the Kumari Mountain , indicated by an arrow in the First Image, and it starts from what is the presently known as the Western Ghats and extends to Madagascar, where the Mascarene plateau lay in ancient times. Since Satyavrata Manu was meditating on t a higher plane because of the great flood, the Mascarene plateau fits. As He is reported to have meditated in Malayamarutha, I am of the opinion that the Malayamarutha lay somewhere in Mascarene plateau..
10.Arctic being one of the Patalas, can Antarctic be the other? 11.Considering the worship of Shiva in the South preceding the Vedic Texts, the presence of temples and Hills in the South relating to the older periods, The presence of Agastya in the South, Tamil worship of Shiva and Subrahmanyaaas Murugan as predominat deities, probable that the Antarctic could have been the place for Daksha( though this contradicts Himalaya Dakshaand Dakshyayani(Sati) where he hid from Veerabhadra, who was created by Shiva to destroy Dasha Yagnya?
Manu left because of a Tsunami. The city of Poompuhar which is dated now as being 11000 years old was deluged by a Tsunami. This is echoed in the great flood that devoured the Atlantis/ Please read my post on Gondwana.
The descriptions found in the Puraná about the descriptions of the Land Masses, check out. This could explain why the Sanatana Dharma remains are found everywhere. It was not difficult for Sanatana Dharma to spread. By looking at the position of India in the map, one can understand how the Tsunami devoured India and how Sanatana Dharma was right in describing geographical details .