Terminus . The lower-most margin, end, or extremity of a glacier. Also called Toe, End or Snout.
What is the leading edge of a glacier?
Glacial ice always moves downhill, in response to gravity, but the front edge of a glacier is always either melting or calving into water (shedding icebergs). If the rate of forward motion of the glacier is faster than the rate of ablation (melting), the leading edge of the glacier advances ( moves forward ).
What are the parts of a glacier?
Head: The uphill, top end of a glacier. Terminus: The downhill, bottom end of a glacier. Snowline: The area between the summer melting and accumulation area where the snow lasts from season to season. Brittle Zone: Crevasses are common in this zone.
What are glacial ridges called?
ESKER . (geology) a long winding ridge of post glacial gravel and other sediment; deposited by meltwater from glaciers or ice sheets.
What is glacier snout?
the lowest end of a glacier ; also called glacier terminus or toe.
What are 2 types of glaciers?
- Ice Sheets. Ice sheets are continental-scale bodies of ice. ...
- Ice Fields and Ice Caps. Ice fields and ice caps are smaller than ice sheets (less than 50,000 sq. ...
- Cirque and Alpine Glaciers. ...
- Valley and Piedmont Glaciers. ...
- Tidewater and Freshwater Glaciers. ...
- Rock Glaciers.
What are the major parts of a glacier?
Glaciers have two main sections: the accumulation area and the ablation area . The accumulation area is where temperatures are cold and snow collects, adding mass to the glacier. The ablation area is where temperatures are warmer, so some of the glacier melts.
What part of a glacier moves the fastest?
The flowing ice in the middle of the glacier moves faster than the base, which grinds slowly along its rocky bed.
What happens when a glacier encounters the sea or a lake?
What happens when a glacier encounters the sea or a lake? Large blocks of ice collapse off the front of the glacier and become icebergs . As snowflakes are buried and compressed, eventually becoming crystalline ice.
What part of the glacier flows the fastest Why?
The ice in the middle of a glacier flows faster than the ice along the sides of the glacier.
What are the 4 types of moraines?
Moraines are divided into four main categories: lateral moraines, medial moraines, supraglacial moraines, and terminal moraines . A lateral moraine forms along the sides of a glacier. As the glacier scrapes along, it tears off rock and soil from both sides of its path.
Where is the largest glacier in the world?
Lambert Glacier, Antarctica , is the biggest glacier in the world. This map of Lambert Glacier shows the direction and speed of the glacier.
Which is the best description of glacial till?
Glacial till is the sediment deposited by a glacier . It blankets glacier forefields, can be mounded to form moraines and other glacier landforms, and is ubiquitous in glacial environments.
How can we tell where a glacier terminus once ended?
Tracking the change in location of a glacier terminus is a method of monitoring a glacier's movement. The end of the glacier terminus is measured from a fixed position in neighboring bedrock periodically over time .
Are Alpine glaciers older than ice sheets?
Which combination of conditions is best suited to the formation of glaciers? a) High latitudes and/or high elevations. ... a) Alpine glaciers are typically larger and older than ice sheets .
What is the equilibrium line of a glacier?
boundary between the accumulation area and ablation area where the mass balance is zero . glaciers.
