rlQuote:I leave open the possibility that they existed all the way back to the beginning , including mammoths.
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I dont . The difference between us is that you have no evidence to back up anything, whereas I have some really nice circu,stantial evidence from a number of bases.
We have no evidence of , eg, mammoths, until around the Pleiocene. At which time we can make a mammoth fossil abundance plot. Lots and lots of them through the few milluion years. Then they go extinct,(which we know is the case because we havent seen any around lately). Your discussion that "you hold open the possibility that they go back to the beginning" Thats when? the Cambrian base? or the Vendean (with evidence of pre-hard shelled animals? I wonder what the mammoths ate when their were only algae around.
Your story really needs a lot of dispensation with logic and evidence. (Thats ok, I think Ive gotten you to admit clearly what you believe happened, and Im not going to dwell on it further. (To make your position factual, you need to have a world that isnt too old, that would make your evidence free assertions at least a bit more logical)
Quote:Yeah we know that you don't believe in a single worldwide flood.
But apparently you do believe in as many as 5-10 mega catastrophes that wiped out the vast majority of living creatures that you think existed at those points.
. I dont ACCEPT a worldwide flood because there is not any stratigraphic evidence for it. As far as the mass extinctions, we have evidence of extreme vulcanism, bolide impact, extreme dips in oxygen levels that correspond to the compression of Rhodinia, however, we have NO EVIDENCE for a worldwide flood. PS. With the evidence for mass extinctions, we have some really goodcollateral evidence from reconstructed Malenkovitch cycles , or axial precession, radiological data, and geomagnetic data that fits and brackets the time bands when these worldwide mass extinctions occured.
As far as numbers of species wiped out during a mass extinction, it is really quite easy to see the sediments before and after the event.For example, in the Pewrmian, were pretty sure that extreme vulcanism played a part because the major victims were sea creatures. The reason is that, from 3 massive flood basalt vents, we can do the stoichiometric analyses of the remnants of oceanic ions. There was a huge excess of Sulphate in the sediments just at and post the end of the Pewrmian. Also the oxygen isotopes favor a conclusion that the seas were quite warm and ice free. This led to a fairly decent conclusion that thes eas were acidic. H2So3 and SO4. pH limits for trilobites were exceeded and they died, many other sea creatures died. The land animals that lived apparently all had some adaptation benefit that we can still only guess at.
But to all of this, your strongest argument is that you "believe" that mammoths lived and died for a long period, without a trace. If they lived in the Permian (when all the "mammals were terapsid reptiles" , we dont see a single mammoth, horse (all of the species, cats bats etc etc)
Ill leave the argument go and wont repond further on this point. Im satisfied that were going to continue to not see eye to eye. Anyway, its not important what you "believe". Its important what we can prove.