Glacier Erosional Landforms

What are some of the landforms that are evidence of past glaciers in regions where there are no glaciers today?

• U-shaped valleys

• Fjords

• Ribbon lakes

• All of the above

What process forms a corrie, also known as a cirque, at the starting point of a glacier?

• Freeze thaw and plucking

• Abrasion

• Rotational slip

• Bergscrund formation

What is the name of the ice moving in a circular motion at the bottom of a corrie?

• Basal Sliding

• Bergscrund

• Rotational Slip

• Abrasion

What do two back-to-back corries eventually erode to form?

• A narrow knife edge ridge

• A u-shaped valley

• A pyramid peak

• An arete

What is the name of the sharp ridges formed when three corries back into each other?

• Pyramidal Peak

• U-shaped valleys

• Fjords

• Cirques

How do glaciers carve out valleys in comparison to rivers?

• They cut straight through hard rock

• They flow around areas of hard rock

• Glaciers leave behind v-shaped valleys

• Rivers leave behind u-shaped valleys

What happens to low-lying u-shaped valleys when global temperatures and sea levels rise?

• They become fjords

• They form ribbon lakes

• They erode into aretes

• They create pyramid peaks

What feature is associated with valley glaciers and results from the difference in erosion rates?

• Hanging valleys

• Moraines

• Truncated spurs

• Ribbon lakes

What feature is left behind by retreating glaciers on the valley floor?

• Finger lakes

• Ribbon lakes

• U-shaped valleys

• Moraines

What geological feature encircles the lower end of a ribbon lake?

• Terminal moraine

• U-shaped valley

• Arete

• Bergscrund