Oh, Snap! (kutsuwamushi) wrote in little_details,
Oh, Snap!

[ANON POST] Blood on stone

I'm trying to figure out how long a blood stain can last on a stone.

In my story my characters find an altar belonging to an ancient culture that did large animal sacrifices on important dates. The altar is on a platform in what used to be a town square and has not been overgrown with plants yet. The climate is hot and dry but is near a confluence of rivers.

I want the staining to be visible to the naked eye ~4,000 years after the last sacrifice was performed. Is this even possible? If ~4,000 years is too long, how long COULD the stains be visible?

I can pick the best kind of stone for it. I can add a roof if need be, but it should be open on the sides because the sacrifices were public events.

I don't know how to google this. I googled variations "ancient blood stains archaelogy" and "ancient blood stains maya" and got a lot of scientific results about testing for proteins and such, but nothing about whether, under ideal conditions, any staining could be visible to the naked eye.
Tags: ~archaeology

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