Depostional Landforms Flashcards
(10 cards)
List all depositional landforms
Drumlins
Erratics
Moraines
Outwash plains
Esker
Kettle
Kame
How is a drumlin formed ?
drumlin is an oval-shaped hill often formed of moraine that has been deposited as a glacier moves forwards. Drumlins indicate the direction that the glacier was flowing in.
How is an erratic formed ?
An erratic is a large rock or boulder that has been transported and deposited by a glacier, often resting in an area of different rock type. It forms when a glacier picks up rocks through plucking or abrasion, carries them over long distances, and deposits them when the ice melts, leaving the rock stranded in a new location.
How is a moraine formed ?
A moraine is a landform made of unsorted glacial debris (till) deposited by a glacier. It forms when material carried by the ice is left behind as the glacier retreats. Different types include terminal, lateral, medial, and ground moraines.
How is an outwash plain formed ?
An outwash plain is formed by meltwater streams flowing from a glacier. As the water loses energy, it deposits sorted sediments (sand and gravel), creating a flat, gently sloping plain beyond the glacial snout.
How is an esker formed ?
An esker is a long, winding ridge of sorted sand and gravel. It forms from meltwater streams flowing beneath a glacier, depositing material in tunnels. When the ice melts, the sediment remains as a ridge.
How is a kettle hole formed ?
A kettle hole forms when a block of ice becomes detached from a retreating glacier, is buried by outwash, and later melts, leaving a depression that often fills with water to form a kettle lake.
How is a kame formed ?
A kame is a mound or hill of sand and gravel deposited by meltwater. It forms when sediment collects in hollows or ice crevasses on a glacier and is deposited on the ground as the ice melts.
How many types of moraines are there ?
3
List the names of all types of moraines ?
End moraine
Lateral moraine
Medial moraine
Recessional moraine
