Deep roots for one thing should prevent lithification
Nope. Billions of tons of pressure, standard and known chemical reactions.
How about all the organic matter that would have become mixed with the soil?
How about the previous discussion of exactly that? What's your response?
Nobody was there, after all, everything is a guess or an estimate or a speculation or a hypothesis, including yours.
Except ours is derived from examining
all the evidence and testing our hypotheses.
Edited by JonF, : No reason given.