Fog Horn, I came across this and thought you might be interested in the thoughts of people through the history of Ancient Egypt about this thing called 'Benben' in their religious beliefs and it's relation to ideas about volcanic and seismic activity. I'm not sure if you've heard of it before. Unfortunately, it doesn't seem easy to find in-depth research by professional experts about it.
The mound rising up from the waters sounds like a submarine volcano, the Leviathan in the Bible. In some civilisations, the submarine volcano would have been seen as the creator god and in others, which worshipped land volcanoes, the submarine volcanoes seem to have been viewed as monsters, dragons, devils, adversaries.