During the Last Glacial Maximum, about 20,000 years ago, sea levels were more than 900 feet (300 meters) lower, exposing large parts of the shelf areas of the continents Weathering and erosion caused rocks to break down, releasing heavy metals into the soil. At the end of the last ice-age, between about 14,000 and 6,000 years ago, the sea levels rebounded. The previously exposed areas were inundated and the metals became dissolved in the seawater. Over time the heavy metals will accumulate in the marine food chain, with humans acting as apex predator and getting the highest potentially toxic levels.>>>>>>>>>>>>>>>>>>>>>>>>
This is a bit of a reach. This level of toxicity had to come from huge amounts of toxins being leached into the earths water, but more likely would have to come from precipitants out of the atmosphere. This could only come from explosions or large scale scouring of the earth by plasma gouging of the earth’s surface as described by Electric Universe theory:
https://www.everythingselectric.com/product/michael-steinbacher/
https://www.definitions.net/definition/uniformism
Uniformism (noun) the doctrine of uniformity in the geological history of the earth; — in part equivalent to uniformitarianism, but also used, more broadly, as opposed to catastrophism...
That’s what you are up against. Steinbacher keeps them awake at night, just as Velikovsky did.