Types of Glaciers

Ice sheets:

Ice sheets are large masses of ice that cover broad areas and are not confined by the walls of a valley.  They are incredibly thick, often obscuring underlying landscape features, such as mountains and valleys. Examples of ice sheets include the Greenland ice sheet and the Antarctic ice sheet

Greenland ice sheet
Greenland ice sheet.  Source: https://www.mnn.com/earth-matters/wilderness-resources/stories/types-glaciers




Cirque glaciers:

Cirque glaciers are a type of glacier that occur in bowl shaped depressions and are confined to the headlands of mountain valleys.

Talèfre Glacier, Mont Blanc, France

Talèfre Glacier, Mont Blanc, France.  Source: https://www.mnn.com/earth-matters/wilderness-resources/stories/types-glaciers





Valley Glaciers:

Valley glaciers are long, narrow glaciers, that flow downvalley, confined within the valley walls.  Unlike cirque glaciers, they are not confined to the headlands.



Fraser Glacier, Alaska
Fraser Glacier, Alaska.  Source: https://www.nps.gov/articles/valleyandpiedmontglaciers.htm




Tidewater Glaciers:

Tidewater glaciers are valley glaciers that flow all the way down to the coast and interact with marine waters.

Hubbard Glacier
Hubbard Glacier, Alaska, the largest tidewater glacier in North America.  Source: https://www.nps.gov/wrst/learn/nature/glaciers.htm