While that's an interesting argument I don't this applies to the Fe-60 isotope. I don't think we know of an energy production process (fission or fusion) that w

While that's an interesting argument I don't this applies to the Fe-60 isotope. I don't think we know of an energy production process (fission or fusion) that would result in Fe-60 as a byproduct which would cater to the Silurian hypothesis. Especially in the quantities and locations discovered. Hence I think their assumptions - of looking for natural places where the isotope is forged - in this case are valid.