Remember also that creationists recognize that the Bible describes great upheavals in the ancient world. Most scientists, liberal and conservative, recognize that IF there was a universal Flood it was likely accompanied by massive amounts of earthquakes and volcanism, both of which would affect--isotopes in the atmosphere for which assumptions are made regarding dating.
Except that if there was such an "universal" flood as you believe, then there would be massive amount of evidences for such flood everywhere in the world, to single point in time.
There are no such evidences in that instance of time in any part of 10,000 years history of man.
You are speculating, nothing more, nothing less, that such a flood has occurred. There have always floods occurring each year, some larger than others, but none of show evidences of that as described as the bible, in which it wiped out all those except the survivors in the ark.
And you are further speculating about Genesis flood, by that there were volcanoes and earthquakes, but none of that is remotely hinted at in the 2 chapters of Genesis. It mentioned no sea, only rain and water coming directly from the ground, so it doesn't say anything about tsunami.
And you are forgetting that if there were earthquakes and volcanic activities to go with the global flood, there would also be tonnes of evidences that there were quakes and volcanic eruptions to go with the flood at one specific point in time...but guess what, BilliardsBall, there are no such evidences.
If quakes and volcanic activities were the cause of the global flood, then there would be conclusive evidences in every parts of the world, all pointing to a single year of global apocalyptic event. But no scientists, no geologists and no anthropologists have ever been able to dated such an apocalypse.
If there were quakes, volcanoes and flood, all happening globally as you claim, then in what year did all this happen, BilliardsBall?
All you are doing is just making things up, but with no evidences to show for it. That's not science, that's not history, it just your spinning your pseudoscience circular reasoning.