Question

Question #180b4

Answer 1

The best chronological markers are artifacts with sufficient organic matter for carbon-14 dating.

Explanation:

Depending on the time resolution required, isotopic ratio measurement is one of th best methods for dating ancient artifacts.

Because useful vegetation for use in artifacts must be concurrent with the users it is a better marker than stone or even metal implements.

Some specific artifacts may have previously been proven to occur only within some time frame. Other similar artifacts from other sites may be considered to be within the same time frame unless other evidence suggests otherwise.

Answer 2

One marker would be tree rings,

Explanation:

Tree rings show distinctive patterns of yearly growth. Some years are dry and the rings are thin. Other years are wet and the rings are thick. By matching tree ring patterns the age of a piece of wood buried in the past the age of the wood can be determined.