[Renfield]

Well, it would take me a while to round these up. I work in a profession that requires me to keep up with advances in Quaternary geomorphology and geology, but I don't keep references at home.

As for structures underwater, we should not rush to judgement that they are manmade. Plenty of natural petromorphs appear anthropogenic, but are not (for example, basalt crystals that are perfectly hexagonal in cross-section). These may be no more than granitic dikes or sills that cooled slowly, and produced macrocrystalline structures.

By the way, I've been following these issues since I read an article about a "causeway" underwater around Bimini in Argosy magazine in 1969. I'm not new to this...but I haven't seen any convincing evidence that these structures are anthropogenic.

[Renfield]

I'm getting excited now. Anyone interested in starting a Pleistocene/Quaternary geomorphology/geology/paleoclimatology discussion forum here?

[blam]

"As for structures underwater, we should not rush to judgement that they are manmade. Plenty of natural petromorphs appear anthropogenic, but are not (for example, basalt crystals that are perfectly hexagonal in cross-section). These may be no more than granitic dikes or sills that cooled slowly, and produced macrocrystalline structures. "

Dr Robert Schoch (PhD Geology/Geophysics), in his recent book, Voyages Of The Pyramid Builders says, that from all he's seen, they're natural structures. I have to 'go with' his disposition and assume he has seen at least as much data as we have and probably more. There is a (spanish name) geogolist working with the group who says that they are not natural.

The question posed to me 2-3 years ago was, if they are manmade how did they get there? Hence, my theory. (Inspired by Ryan and Pittman's work in the Black Sea)