How are archeological sites formed over time? How does excavation impact archeological sites? How do human activities impact the earth’s natural layering? Objective 1. Understand the natural and cultural processes of archeological site formation 2. Demonstrate the processes of archeological excavation 3. Explain the concept of stratigraphy and relative dating 4. Explain the process of time through Earths natural layers. 5. Explain how people can easily disturb Earths natural layers. Background Archeological sites are formed through various natural and cultural processes. Over time natural proc Duration: 60 Minutes.