1. What is a cirque?
A cirque is a steep sided hollow or amphi-theater type depression that is the result of glacial erosion at the head of an alpine valley.
2. Provide two glacial features that are created via erosion or deposition - ensure you differentiate which you choose.
erosion - cirque, arete, horn, tarn, v,u shaped vallies
deposition - moraine, erratic (kame, esker but we haven't talked about this yet)
3. What are the 4 ways erosion happens in a river system?
Abrasion, Attrition, Hydraulic Action & Solution
4. Explain one of the above erosional actions.
Abrasion: causes river bed to become deeper through the action of scraping or wearing away
Attrition: stones and rocks knock together breaking into smaller particles so the bedload is breaking itself apart or by hitting the bed
Hydraulic Action: the ability of moving water to dislodge and transport rock particles, breaking up the banks
Solution: Water dissolved soluble materials
