This post is about the recent footprints found in the dried up river bed in texas. I’m aware about carbon dating, but I thought you have to have organic material. And to add on top of that, wouldn’t the layer of earth that dates back be eroded/built upon by sediments in the river?
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Yes, the layer the footprints are in was eroded by the river. But that’s because there were 65+ million years worth of layers that the river had to cut through first. Those particular footprints. just happen to be exposed at the moment. Ones that were exposed earlier may have been eroded away already. Or there are ones that haven’t yet been exposed.
Texas geology is pretty well known due to oil exploration, so they know which exposed levels belong to which ages.
https://d32ogoqmya1dw8.cloudfront.net/images/NAGTWorkshops/intro/activities/geologic_map_texas.jpg
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