Nant Ffrancon and Ogwen Valley Flashcards
1
Q
Nant Ffrancon and Ogwen Valley
A
- Experienced; glacial, fluvioglacial and periglacial since last glacial max
- U-shaped valley
- Llyn Ogwen
- Cwn Idwal
- Hanging valley
- Patterned ground
2
Q
U-shaped valley
A
- Distorted by moraine deposits and scree from weathering and mass movement
3
Q
Llyn Ogwen
A
- Occupies an area of trough floor that was opened by extending and compressing flow = Ribbon lake
4
Q
Cwn Idmal
A
- Arm shaped hollow on hillside of valley
- Formed due to plucking and abrasion as of rotational flow
5
Q
Hanging valley
A
- Ice from the main valley has gone and ends abruptly.
6
Q
Patterned Ground
A
- Active layer freezes
- Ice crystals develop
- Frost heave occurs at dome on surface = stone polygons
