# Package: SnowAndIceRegions

Parent: Physiography

## Relevant types:

Name | Type | Definition | Description
--- | --- | --- | ---
Crevasse_C | Feature Type | A deep crack or fissure in a glacier that results from differential movement of ice. | -
Crevasse_S | Feature Type | A deep crack or fissure in a glacier that results from differential movement of ice. | -
Esker_C | Feature Type | A long, narrow ridge of sand and gravel deposited by a glacial stream. | -
Esker_S | Feature Type | A long, narrow ridge of sand and gravel deposited by a glacial stream. | -
Glacier_S | Feature Type | A large mass or river of ice formed by accumulation and compaction of snow on higher ground that is moving slowly down a slope or valley from above the snowline. | -
IceCap_S | Feature Type | A permanent layer of ice covering a tract of land (especially a polar region) or the top of a mountain. | Usually includes a surface layer of snow.
IceCliff_C | Feature Type | The vertical face of a glacier or ice shelf. | -
IceCliff_S | Feature Type | The vertical face of a glacier or ice shelf. | -
IcePeak_P | Feature Type | A rocky peak projecting above a surrounding ice field that may be perpetually covered with ice. | -
IcePeak_S | Feature Type | A rocky peak projecting above a surrounding ice field that may be perpetually covered with ice. | -
IceShelf_S | Feature Type | A floating ice sheet of considerable thickness that is normally attached to the land along its landward edge. | Ice shelves are the seaward extension of land glaciers. Limited areas of the ice shelf may be aground where the glacier first enters the water and possibly in other places offshore. Ice shelves are usually of great horizontal extent and have a level or gently undulating surface. The seaward edge of an ice shelf is termed an 'ice cliff'.
PackIce_S | Feature Type | Term used in a wide sense to include any area of sea ice other than fast ice. | Pack ice commonly consists of connected floating plates of ice and has a mosaic look. Fast Ice is defined as sea ice which remains fast, generally in the position where originally formed, and which may attain a considerable thickness. Fast ice is found along coasts, where it is attached to the shore, or over shoals, where it may be held in position by islands, grounded icebergs, or grounded polar ice.
Pingo_P | Feature Type | A cone or dome shaped mound or hill of peat or soil, usually with a core of ice. | It is found in tundra regions and is produced by the pressure of water or ice accumulating underground and pushing upward.
Pingo_S | Feature Type | A cone or dome shaped mound or hill of peat or soil, usually with a core of ice. | It is found in tundra regions and is produced by the pressure of water or ice accumulating underground and pushing upward.
PolarIce_S | Feature Type | Sea ice that is more than one year old and more than 3 metres thick. | Sea ice is any form of ice which has originated from sea water.
SnowIceField_S | Feature Type | A large area permanently covered by snow and/or ice. | May cover land and/or water.