Here is another good extract from the Narada Purana.Enjoy reading it!
"The Meru mountain which lies at the central portion of the earth is
the dwelling place of all the gods.At the ultimate boundary of the
earth is situated the Lokaalok mountain.Between Meru and Lokaalok
mountains lie the seven seas and the seven dveepas.In every dveepa
there are seven main mountains and rivers.The people living here are
lustrous like gods.Jambu,Plax,Shalmali,Kush,Krounch,Shaka and Pushkar
are the seven dveepas."
HE Anthropology:Many tribes that suddenly appeared on the earth have
their origins in these dveepas.The Shakas were from the Shaka
dveepa.The Kushanas were from the Kushadveepa.They have been wrongly
mistaken by the modern historians as indianised Greeks.Actually,they
are the HE people who somehow `sprang up' from the mountain ranges
of Central Asia.In fact even the Hellenic Greeks could have been from
one of these Dveepas.
The Puranas say that the Brahmans living in Shakadveepa are
called `Maga'.Surprisingly,the priests in Old Persia were