Anna Marina or "Mary the Contrary",
Re Calvin why make something up when his commentary is avaible online, re Genesis 1:6; "Moses describes the special use of this expanse, to divide the waters from the waters from which word arises a great difficulty. For it appears opposed to common sense, and quite incredible, that there should be waters above the heaven. Hence some resort to allegory, and philosophize concerning angels; but quite beside the purpose. For, to my mind, this is a certain principle, that nothing is here treated of but the visible form of the world. He who would learn astronomy, (60) and other recondite arts, let him go elsewhere. Here the Spirit of God would teach all men without exception; and therefore what Gregory declares falsely and in vain respecting statues and pictures is truly applicable to the history of the creation, namely, that it is the book of the unlearned. (61) The things, therefore, which he relates, serve as the garniture of that theater which he places before our eyes. Whence I conclude, that the waters here meant are such as the rude and unlearned may perceive." End quote. To the ancient idiots, how could it rain if there was no water above, very simple?
https://www.studylight.org/commentaries/eng/cal/genesis-1.html
Good short study on chaoskampf
https://www.researchgate.net/publication/292086738_Did_God_Create_Chaos_Unresolved_Tension_in_Genesis_11-2
"In verse 2, the description of the earth as IPDI ΙΠΓ) and the reference
to DÎnn recall the idea of creation as the transformation of primordial
chaos found in other Ancient Near Eastern creation myths, and
elsewhere in the Old Testament. This emphasises the possibility of the
return of chaos, God's ongoing power to bring order and renewal to the lives of his people, and the promise of his final eschatological victory
over all that opposes him."