The “missing generations” idea between Noah and Abraham is not new, RTB uses this device in order to drive Adam back to a believable timeframe where he could be the father of the whole human race. I don’t think this is a workable idea for a number of reasons. Whereas the writer of Genesis states simply that Noah was “perfect in his generations” (Gen. 6:9), the writer of Jubilees went into great detail listing the names of the wives and their lineage from Adam to Noah. From Noah to Abraham he did the same thing as in this example: “Terah took to himself a wife, and her name was 'Edna, the daughter of 'Abram, the daughter of his father’s sister.”1
It is unthinkable to me that he would go into this much detail for every named patriarch from Noah to Abraham and then just eliminate dozens of others, wives and all.
- Jubilees 11:13.