So in Mesopotamian mythology, the goddess Tiamat is killed by Marduk, and her body is then made to fashion the heavens and the earth, including the vaults of heaven.
In the Bible God makes a similar vault by His own powers, without the body of a primordial symbol of chaos.
Is the Biblical story a counterpoint to the myth of Tiamat? Is it saying ‘there is no need of a primordial chaos being, it is simply the work of God’?
Side note: does Genesis begin in media res? It says God created the heavens and the earth, and then says the earth was without form and void. So did God already make it? That would explain the Spirit of God hovering over the deep.