Continental Glaciers
* Size and Shape: Vast, covering large areas of land, often entire continents. They have a dome-like shape, with ice flowing outward from the center.
* Formation: Form in cold, high-latitude regions where snowfall exceeds melting and sublimation. Accumulated snow compacts over time, turning into glacial ice.
* Movement: Slow-moving, with ice flowing outwards from the center due to gravity.
* Landform Impact:
* Erosion: Create vast, flat plains called "glacial outwash plains" by eroding and transporting sediments.
* Depressions: Form large, deep depressions called "glacial lakes" when the ice melts.
* Hills: Leave behind rounded hills called "drumlins" and "eskers" formed by deposition of glacial sediments.
* Fjords: Carve deep, narrow inlets along coastlines, especially in areas where the glaciers have retreated.
Valley Glaciers
* Size and Shape: Smaller, confined to mountain valleys. They have a tongue-like shape, flowing down the valley.
* Formation: Form in high mountain regions where snowfall is abundant and temperatures are low. Accumulated snow turns into ice within the valley.
* Movement: Flow down the valley due to gravity, carving the landscape.
* Landform Impact:
* U-Shaped Valleys: Carve out U-shaped valleys from the original V-shaped valleys, leaving behind steep, often vertical sides.
* Hanging Valleys: Smaller tributary valleys that hang high above the main valley floor, creating waterfalls when the glacier retreats.
* Cirques: Bowl-shaped depressions formed at the head of a valley glacier.
* Moraines: Deposits of rock and debris left behind by the glacier, forming ridges along the valley floor.
Key Differences:
* Scale: Continental glaciers are massive, covering large areas, while valley glaciers are confined to individual valleys.
* Movement: Continental glaciers move outwards from the center, while valley glaciers flow down the valley.
* Landform Impact: Continental glaciers create extensive, flat landscapes and large depressions, while valley glaciers carve out dramatic, U-shaped valleys and other features specific to mountainous regions.
In Summary:
Continental glaciers are vast, powerful forces that reshape entire landscapes, creating expansive plains and deep depressions. Valley glaciers, though smaller, have a significant impact on mountain regions, carving U-shaped valleys, hanging valleys, and other distinctive features.
