Good points, above.
In studying the book of Genesis, I've often been intrigued by similarities with the creation stories of other cultures. For this reason, I viewed the beautiful narrative in MN as drawing from similar sources and traditions as Genesis, rather than a point-by-point reworking of the story.
Interestingly, although some popular images such as animals in pairs or apples are associated with Genesis, I don't think specific reference exists to either of them. (Animals are created, but I don't think it's explicitly stated they're created in pairs, as in some Native American legends. And the "apple" interpretation of the forbidden fruit is a medieval innovation, I think).
The themes of a garden and a temptor/temptress are also common to other stories, such as Mesopotamian, Sumerian, and even Greek legends. However, it's never occurred to me before now that Mr. Beaver's notion that Jadis was descended from Lilith might have had something to do with her presence and actions at the birth of Narnia.
Anyway, this is probably another example of CS Lewis working on multiple levels simultaneously. Hopefully, the depth of his storytelling ability will be successfully conveyed.
(And seriously, check out the first chapter of the Silmarillion, if you haven't read it before or looked at it recently!)