Genesis 8:2

The fountains also of the deep and the windows of heaven were stopped, and the rain from heaven was restrained;

Note:  "The fountains also of the deep" references water's that came from the bottoms of the ocean, possibly through some cracks in the ocean floor that were under extreme high pressure?

Genesis 7:11

In the six hundredth year of Noah's life, in the second month, the seventeenth day of the month, the same day were all the fountains of the great deep broken up, and the windows of heaven were opened.