Eq3 Assessment Flashcards
1
Q
U shaped valleys
A
- study extent through trimlines on valley sides
- below line can see evidence of glacial abrasion eg. Striations
- trimline shows extent was filled with ice
- eg. Langdale lake district
Eval
- only reveal localised extent no grand scheme
- may change depth due to climate fluctuations
2
Q
Roche moutonnes
A
Movement
- stoss point upslope
- lee point downslope
- may be striations on stoss parralel to ice movement
Eval
- exposed to weathering and erosion cal alter shape
- human activities can alter shape eg. Farming, mining
3
Q
Drumlins
A
Both
- rounded mounds formed parralel to ice flow
- broad upstream tapered downstream
- their long axis is parallel to movement
- more in a swarm/collection suggests greater extent
Eval
- example of equifinaty dont have agreed upon method of formation
- modified by human activities eg. Glasgow drumlin field
4
Q
Erratics
A
Movement
- rocks that were transported by a glacier, and then left behind after the glacier melted
- distinctive lithology can trace it back to the location where the distinctive bedrock is found
- shap granite from cumbria
Eval
-confused by multiple glaciations
5
Q
Sandur/outwash plain
A
Extent
- marks maximum extent of glacier
- area in front of snout of glacier, shows furthest point
6
Q
Esker
A
Movement
- suggest direction glacier comes from as the glacier would be flowing parallel to the downslope
- height shows velocity of retreat, steeper ridge slower movement
Eval
- can change direction of movement
- weathering and erosion change shape
