More:
Studying sediment layers, ice cores, and tree rings to estimate time spans.
Discussion
https://m.youtube.com/watch?v=LaHcHwPj4sw&pp=ygUVS2VudCBob3ZpbmQgaWNlIGNvcmUg
He sites a time where some air craft in ww2, dug out of ice a few decades later were actually hundreds of years old 😂
Tree rings vary depending on moisture
Ice cores depend on temperature changes
Sediment organizes based on size, shape, and density