Glacial Processes and Landforms

______ refers to the removal of glacial ice and involves melting, sublimation, and calving.

Ablation

Glacial striations are formed by way of _____.

Abrasion

Which process of stream erosion also occurs at the base of a glacier?

Abrasion

Glacial Ice

Begins as snow, becomes compressed over time and increases in density (snow-firn-glacial ice_. Humid climates form glacial ice more rapidly than drier

Cirque

Bowl-shaped basin near the summit of a mountain, resulting from plucking

A solitary hill composed of reworked glacial till deposited by a previous glacier is called a _____.

Drumlin

A glacial valley that has been flooded by the sea is called a ______.

Fjord

Name the types of glacial landforms

Glacial trough Cirque Arete

Calving

Ice breaks off the end of the iceberg

Glacier

Large mass of perennial ice on land or floating shelf-like adjacent to land

Tarn

Small lake occupying a cirque

Drumlin

Solitary hill of reworked glacial till Elongated in the direction of glacial movement

Stratified Drift

Sorted rock material deposited by glacial meltwaters

Horn

Steep, rocky peak that has been eroded on several sides by glaciers

Glacial sediments, consisting of sand and gravel, that have been deposited by meltwaters are called ______.

Stratified drift

Glacial Till

Unsorted rock material deposited directly by a glacier

Glacial trough

Valley that has been reshaped by glacial erosion Deep, steep-sided with a wide, flat floor "U-shaped" valled Ex. Fjord, hanging valley, etc.

Arete

Shear, "knife-like" ridge between two cirques or two troughs Horn

Which of the following glacial landforms is composed of glacial till?

Moraine

Name the types of depositional landforms

Moraines Drumlin Esker

Esker

Narrow, winding ridge of sand and gravel (stratified drift), formed where a meltwater stream once flowed along the base of a glacier

Plucking

Pieces of bedrock are pulled loose at the base of the glacier

Name the processes of glacial erosion

Plucking Abrasion Surface transport

Ablation

Removal of glacial ice Involves melting, sublimation, and calving

Moraines

Ridges of glacial till Ex. Lateral and medial moraines

Surface transport

Rock material carried on the surface of the glacier as a result of mass movement and erosion from the surrounding slopes Glacier acts as slow-moving "conveyor belt" for rock material

Drift

Rock material deposited as a result of glaciation

Abrasion

Scouring/polishing of the land surface by rocks that are moved along at the base of the glacier Much like sandpaper polishes a wood surface Glacial striations