quote:If I undersatnd it correctly, your explanation instead requires millenia of sandstone, then millenia of shale and then millemnia of limestone, completely arbitarily.
I wouldn't say completely arbitrarily. We have many modern examples of similar sequences that seem to be forming agonizingly slowly. Show me a way to form a lot of that limestone quickly. Or shale, for all that...
quote:Originally posted by Tranquility Base: Coragyps
See my answer to Edge on calcium sources.
When did those shells find time to grow? Where will you get the dissolved calcium, and what will you do with the emitted carbon dioxide, from either their growth or from chemical precipitation? "General Flood Topic", post 17 and following, please.