Lake District case study - valley glaciers Flashcards
1
Q
where is the lake district located ?
A
North west Cumbria
2
Q
what glacial period most impacted the lake district
A
pleistocene period
3
Q
Skiddaw slates
A
- Oldest in Lake District
- Found in the north
- Formed from material 500 mil years ago and since has been raised up by tectonic forces
- Forms smooth mountains
4
Q
Borrowdale volcanics
A
- Found central Lake District
- Formed from harsh lava and ash from volcanic eruptions 450 mil years ago
- Makes up the highest points such as helvellyn
5
Q
windermere series
A
- Formed of sedimentary mudstones, sandstones, siltstones and some limestones - 420 million years ag
- Moved overtime and eroded to their present level
- Form gentler scenery - Morcombe bay
6
Q
Glaciation
A
- The present landscape is the result of glaciation during the play during the stein period during the last millions of years.
- However some of the depositional landforms in today as the result of a recent glaciation
- Loch Lomond stadia - which was a brief episode of glacier re-advance
7
Q
Erosional landforms
A
pyramidal peak - seventh of Helvellyn
arete - striding edge / red tarn corrie
glacial trough - ullswater occupies it
Roche mountonneee - Norfolk island
Truncated spur - Walla crag
8
Q
Dimensions of the helvellyn range
A
11 km long rage over 600 m high with numerous glacial erosion landforms.
9
Q
depositional landforms
A
- drumlin fields —> south of Kendal
- Orientation of drumlins show the southwards movement of the glacier
- many tills deposited during glacial retreat
- Erratics such as those at witherslack are from * Borrowdale volcanic group - moved 30km
