If coins are found within strata, or pieces of organic material that can radio carbon dated, then more exact dates can be attributed. Once a collection is formed over various layers in the earth, we are then able to create a proper timeline.

What do you use stratigraphy for?

Stratigraphy is a branch of geology concerned with the study of rock layers (strata) and layering (stratification). It is primarily used in the study of sedimentary and layered volcanic rocks.

What is stratigraphy dating in Archaeology?

Stratigraphy is the oldest of the relative dating methods that archaeologists use to date things. Stratigraphy is based on the law of superposition--like a layer cake, the lowest layers must have been formed first.