Description of Plaksa Dvipa and other Dvipas - Verse 173

The elements earth etc. are the evolutes covered up by one another. They enter into one another, the lesser into the greater. 174. Since they penetrate one another, they have attained stability. Formerly they were without special features. But by intermingling they became possessed of speciality. The earth, fire and the wind, these three are separately and accurately ascertained. 328 Vayu Parana