I have no idea. My wife is a member, and I used to leaf through the abstract book. Their policy was not to reject abstracts unless they were libelous. They simply put all of the crank stuff into a session called 'General Physics'.
I don't have the review requirements for the AGU meeting that these were presented at, but the ones that I can find say "Abstracts must focus on scientific results or their application. The Program Committee may decline to consider abstracts with other focus." I don't think that they would allow abstracts for a numerological proof of Jesus Christ's second coming.
Possibly not, but that doesn't mean they don't have a great deal of latitude in accepting abstracts. Many societies, if space/time are not limiting, will tend to err on the side of accepting pretty much anything, letting the members of the society figure out for themselves what the trash is.
It turns out someone I know is a member of the AGU, so I asked him about it. He basically said that the requirements are:
* You must be a member of the AGU
* You submit an abstract to the chairman of the session
* The chairman submits the abstracts to a committee of other geoscientists in that specialty
* The committee then gives a thumbs-up or thumbs-down
He said that while this isn't as rigorous as peer-review, it has kept the flakes out of the meetings for the most part.
If you want to read the research that was presented, you should check out their book, which is a compendium of their research:
http://www.icr.org/store/index.php?main_page=pubs_product_book_info&cPath=20_30&products_id=2655
A lay version of that book is here:
http://www.icr.org/store/index.php?main_page=pubs_product_book_info&cPath=20_30&products_id=2643