The problem the Cambrian explosion presents for ToE is not just its relatively short time span (five million years, according to S.J.Gould and others).
There are at least three other serious contradictions:
1. The Cambrian explosion reveals the sudden appearace of all animal phyla (except one), followed by diversification within each phylum. So we see disparity first, followed by diversity ... which is the opposite of what ToE predicts - diversity first, which eventually leads to disparity much later on.
2. There is virtually nothing in the way of
evolutionary links between pre-Cambrian and Cambrian biota. The Ediacaran (pre-Cambrian) biota suffered a mass-extinction well before the Cambrian explosion, and all that seems to have existed between the Edicaran and Cambrian were the "small shelly fauna". The evolutionary gap between the "ssf" and something like a trilobite is massive. Where are the transitionals? It seems there are none.
3. ToE predicts a single "tree" of common descent, with interconnecting "branches" between phyla ... but there is no fossil evidence of phylogenetic branches between the many phyla that appeared during the Cambrian explosion.
So instead of Darwinism's single tree of common descent, the Cambrian explosion looks more like an orchard of separate trees.
An estimate of the time as held by some few is a problem- how?
The you say its a contradiction- which is it, how is it either one?
Ive never heard of " disparity / diversity " as a thing
in evolution.
You know of course that fossils of any sort from
the cambrian or pre cambrian are scarce, and there
is no Manhattan Project type fundimg.
" Branches between phyla" You sure? That makes no
sense to me.
Im notbsurevwhat you are getting at.
You accept geological dating.
That there is good fossil record of various lines
of descent. You say there are some ( known) links, but
assume ones not found dont exist?
Is it that you think there were multiple origins to
life leading to the divers kingdoms? Phyla? Class?
That the sometimes- lack of ( so far?) undiscovered
transitional forms means there arent any?
As in, data contrary to ToE?
Ive noticed that many species are known only from one
partial specimen.
What should one conclude from that?
A portion of spine two leg bones and a jaw are all there ever was?
Its the only one that ever existed? No parents or
descendents? Lonely antelope!
I dont see why gaps such as that, in the fossil
record seem to you as data that contradicts the theory.