While researching a topic, a student has taken the following notes:
- Spruce Tree House is an Ancestral Puebloan dwelling site located in southwestern Colorado.
- It was built under a rock overhang and inhabited from approximately 1200-1280 CE.
- The overhanging rock ledges offered protection from heavy rain and snow.
- Ansel Hall is an Ancestral Puebloan dwelling site located in southwestern Colorado.
- It was built on relatively flat terrain and inhabited from approximately 1050-1160 CE.
- This level surface allowed for the construction of large terraced buildings.