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The United Kingdom preserves an outstanding record of glacial and periglacial landscape modification from the Quaternary period. Understanding these relict (fossil) landscapes is central to Edexcel A-Level Geography Enquiry Question 1 (EQ1) and provides essential context for managing glaciated environments in the UK today (EQ2).
During the Devensian glaciation (the last glacial period, approximately 115,000–11,700 years ago), ice sheets covered much of the British Isles:
| Region | Ice Coverage | Ice Source |
|---|---|---|
| Scotland | Almost entirely covered; ice dome centred over the Western Highlands | Scottish ice cap (up to ~1,500 m thick over central Scotland) |
| Northern England | Covered south to approximately the Humber Estuary | Scottish ice, Lake District ice cap, Pennine glaciers |
| Wales | Upland areas covered; ice extended into Cardigan Bay | Welsh ice cap (centred on Snowdonia and the Cambrian Mountains) |
| Ireland | Almost entirely covered | Irish ice dome (centred over western Ireland) |
| Midlands & East Anglia | Partially covered by ice sheets extending from the north | Devensian ice limit approximately follows a line from the Severn to the Wash |
| Southern England | Not glaciated during the Devensian; experienced periglacial conditions | N/A — but was glaciated during earlier Anglian glaciation (~450,000 years ago) |
The Anglian glaciation (~450,000 years ago) was more extensive than the Devensian, with ice reaching as far south as north London. The deposits from this older glaciation are preserved in East Anglia and the Thames Valley.
Exam Tip: Distinguish between the Devensian (last glaciation, northern limit approximately Severn-Wash line) and the Anglian (earlier, more extensive glaciation reaching London). Examiners may ask about the evidence for multiple glaciations in Britain, and knowing that different deposits relate to different glacial episodes demonstrates strong chronological understanding.
The Loch Lomond Stadial was a brief but intense period of glacial re-advance at the very end of the Devensian:
The Lake District (Cumbria) is the most intensively studied glaciated landscape in England and provides numerous examples of glacial and fluvioglacial landforms.
| Landform | Examples | Features |
|---|---|---|
| Corries | Red Tarn (Helvellyn), Scales Tarn (Blencathra), Blea Water (High Street) | North/NE-facing; steep backwalls; tarns occupying over-deepened basins |
| Arêtes | Striding Edge (Helvellyn), Sharp Edge (Blencathra) | Narrow, knife-edged ridges between adjacent corries |
| U-shaped valleys | Great Langdale, Borrowdale, Wasdale, Buttermere | Steep sides, flat floors, truncated spurs, hanging valleys |
| Hanging valleys | Dungeon Ghyll (Great Langdale), Sourmilk Gill (Buttermere) | Tributary valleys elevated above the main trough; often with waterfalls |
| Truncated spurs | Both sides of Great Langdale, Borrowdale | Cliff-like features where interlocking spurs were cut by the main valley glacier |
| Ribbon lakes | Windermere, Ullswater, Wastwater, Coniston Water, Derwent Water | Long, narrow, deep; occupying over-deepened glacial troughs |
| Roches moutonnées | Numerous examples in the central Lake District fells | Smooth stoss, rough lee; indicate ice flow direction |
| Landform | Examples | Features |
|---|---|---|
| Terminal moraines | Southern end of Windermere; across several valley mouths | Arc-shaped ridges; may dam ribbon lakes |
| Lateral moraines | Wasdale, Buttermere valley sides | Ridges of angular debris along upper valley sides |
| Drumlins | Vale of Eden; around Kendal | Streamlined till hills; indicate NW-SE ice flow |
| Erratics | Borrowdale volcanic erratics found across the Solway Plain | Transported by ice from the central Lake District |
Wasdale in the western Lake District provides an outstanding example of an integrated glacial landscape:
| Feature | Detail |
|---|---|
| Wastwater | England's deepest lake (79 m); a ribbon lake in an over-deepened glacial trough |
| Scree slopes | The Wastwater Screes — 500 m of steep scree formed by post-glacial freeze-thaw weathering of the valley wall |
| U-shaped valley | Classic trough shape with steep sides and a flat floor |
| Cirques | Multiple corries on the surrounding fells (Scafell, Great Gable) |
| Moraine | Terminal moraine at the foot of Wastwater, damming the lake |
| Till | Valley floor covered by glacial till deposits |
Snowdonia (Eryri) in north-west Wales preserves a range of glacial landforms comparable to the Lake District:
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