Markandeyapurana 54.12

54.12

samudrāntaḥ praviṣṭāśca ṣaḍasmin varṣaparvatāḥ /
dakṣiṇottarato nimnā madhye tuṅgāyatā kṣitiḥ //

I will tell thee of the constitution of Jambudvīpa; hearken to me. It is a hundred thousand yojanas in breadth and length, it being of a circular shape.[4] Himavat, and Hemakūṭa, Niṣadba,[5] and Meru, Nila, Śveta and Śṛṅgin are the seven great mountain-systems[6] in it. Two of these great mountain-ranges[7] are a hundred thousand yojanas in extent, and are situated in the middle of Jambudvīpa; there are two more mountain-ranges which are south of those two, and two more which are north. They are severally less by ten and ten thousand yojanas in length[8]; they are all two thousand yojanas in height, and they have the same breadth. And six of the mountain-ranges in it extend into the sea. The earth is low on the south and north, it is highly elevated in the middle.