3.4 The Small Pig Horizon

Humans are constantly creating archaeological layers, as dirt and dust accumulate in outside and cover objects. More recent archaeological layers are closer to the surface; later archaeological layers are further down. Archaeologists date layers by consider the types of objects they find in those layers. Usually, the latest object in a layer shows the date after which that layer must have been covered. The objects found in archaeological layers can reveal considerable social changes.

Assess your understanding of this concept using the following widget, then we'll consider a post-Roman example.

(Be advised: the next question contains an image of an animal's skull.)