 चतुर्भागे समुद्रस्य चक्रवान्नाम पर्वतः।तत्र चक्रं सहस्रारं निर्मितं विश्वकर्मणा।। 
 Then move to the fourth part of the western sea where you will see  a mountain called Chakravan occupying a quarter part of the sea.You will find there a thousandspiked wheel built by Visvakarma. 