USGS geologists Kathleen Springer and Jeff Pigati kneeling over a small plot and taking a very close look at the sedimentary layers.
Test areas were dug into the soil to reveal the individual sediment layers that accrue over time. These layers are useful in determining timeframes and discovering additional objects like seeds that can be used in radiocarbon dating techniques.
Permission must be secured from the individual copyright owners to reproduce any copyrighted materials contained within this website. Digital assets without any copyright restrictions are public domain.