I'm not sure that the culture of Gen 1 was directly dependant on the culture that gave us Gen 2 and would go so far as to say that the culture of Gen 1 reflects a major shift, change from the culture of gen 2.
In Gen 2 we see a very local, parochial view of creation. It is very similar to many other creation myths with no detail. It starts with:
4 This is the account of the heavens and the earth when they were created.
and then moves on to bigger and better things. It deals with the things very early man dealt with, fields and streams and rain and tilling the soil.
The Gen 1 account seems to be from a later, more sophisticated culture. It pushes more detail into the story. It tries to explain the stars and moon and sun and heavens. It tries to describe how the things that just are in Gen 2, came about.
Aslan is not a Tame Lion