Dating techniques in archaeology

Archaeologists use relative and absolute dating techniques to find the age of an artifact.

Relative techniques include:
Cation Ratio
Cultural Affiliation
Fluorine Dating
Obsidian Hydration
Patination
Pollen Analysis
Rate of Accumulation
Seriation
Varve Analysis

Absolute techniques include:
Archaeomagnetism
Astronomical Dating
Dendrochronology
Electron Spin Resonance (ESR)
Fission Track
Optically Stimulated Luminescence (OSL)
Oxidizable Carbon Ratio (OCR)
Potassium- Argon Dating
Racemization
Thermoluminescence Dating
Uranium-Thorium Dating

See: http://www.mnsu.edu/emuseum/archaeology/dating/