We're having a debate in R&S...?

about the validity of the Global Flood story. One argument that has been posed against that flood is that the drastic decreases in salt concentration in the oceans (or the flooding of the oceans into the freshwater lakes) would have killed off several thousands of fish/marine species that we see today, and that the only way that they could have been saved would have been if Noah had kept them all in vast aquariums on his ark. The rest follows.

Anyways, the counterargument for this is that the saltwater concentrations back then (some 4-5000 years ago) may not have been what they are now, and that the salt could have been leached from the rocks into the water, and fish populations would have adapted to higher salt levels.

My question is, considering the overwhelmingly high concentration of salt in such a large volume of water, would it have been possible for this to happen in the limited time available (5000 years)? Can that much salt really be leached out into the water that quickly? Also, does this theory stand in face of salt concentration measurements taken from coastal land regions (if there are such measurements)?
 
There's no real debate to be had, which is why you are having it over in R&S, instead of in an academic forum. There is NO scientific evidence for a global flood a la Noah. The strongest case for such a flood would have been confined to a moderately large but still restricted geographic area in the region of Turkey.

It is pointless for the literal Bible readers to try and prove their case scientifically. If you want to believe the Bible is literally true in all particulars, then you have to live by faith alone and forget science altogether. Or, you can do what many Christian scientists (not Christian Scientists, but scientists who are Christian, and there are many) and say that God created the world, and the Bible is a book inspired by Him, but written within a historical context. This makes it no less significant or necessary as a source of spiritual guidance.
 
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