The Geography of the Puranas c7.s5.6

c7.s5.6

(4) There is, according to Matsya, a huge circular mountain chain named Citrasānu situated in the eastern half of the dwīpa. The western half is dominated by another great circular range named Mānasa with Mahāvita (son of Mānas) as its spur covering its western rim. Other Purāṇas also agree that there is a mountain range running through the whole extent of the dwīpa and dividing it into two provinces one of which is exterior and the other interior with respect of the above mentioned ranges. In addition some Purāṇas qualify this statement by saying that this chain of mountains is really a continuous range but appears as split into two, meaning thereby that there is a saddle or break in the range which allows access across it between the exterior and interior region. Mānasa, according to Matsya, looks like a full moon rising near the sea coast.