An example is a frequently used fire ring will leave evidence behind in the soil, but it cannot be moved with the occupants.
After archaeologists have excavated the site completely, or to the extent the project planned, they fill the site back in and take the artifacts to be analyzed.
Using all of the information about the artifacts, including context, typology, dating and more, archaeologists can piece together the events and culture of past society.
The unstable and radioactive carbon 14, called radiocarbon, is a naturally occurring isotope of the element carbon.
When a living thing dies, it stops interacting with the biosphere, and the carbon 14 in it remains unaffected by the biosphere but will naturally undergo decay.
A feature is evidence of a human activity that is not movable, and usually has a vertical component.
An aspect of a site that is only horizontal, such as a road, is not a feature.
Before deciding on using carbon dating as an analytical method, an archaeologist must first make sure that the results of radiocarbon dating after calibration can provide the needed answers to the archaeological questions asked.