[dutch3000]

how are they dating something that isn’t there? are they dating the sand?

[rement]

In this case they are estimating the ages based upon the known ages of the geologic formations surrounding the layers of sand the tracks were found in [0][1].

[0] https://journals.plos.org/plosone/article?id=10.1371/journal... [1] https://www.geotech.hr/en/how-to-determine-the-age-of-a-rock...