Even a 'microscopic siliceous structure', which is what they're talking about here? To be clear, I am in no position whatsoever to challenge your statement, jus

Even a 'microscopic siliceous structure', which is what they're talking about here? To be clear, I am in no position whatsoever to challenge your statement, just curious as to why it would be unlikely for something invisible to the human eye to be shifted around the planet via plate tectonics (which seems entirely plausible to the layperson that I am).