Radioactive elements in dating events and artifacts
The relative density of use is reflected in the archaeological record.
Places where human groups performed some activity and left behind physical remains as artifacts or features are archaeological sites.
This roughly coincides with a shift in climate towards hotter and dryer conditions. In Oregon, the Archaic is usually broken into Early, Middle and Late Archaic adaptations.
Faunal and floral remains as well as features give information on the seasons of occupation as well as resource values and changing resource use through time and across space.During this period of time, the climates and ecology of plants and animals have changed.Populations have grown and in turn, the cultures of Oregon's inhabitants have changed.Any disturbance of the patterns reduces any site's archaeological value.Archaeological sites are non-renewable because the people who created them no are longer alive.