Periglacial Landforms

Question 1

Name the EIGHT types of Periglacial Landforms

Answer 1

. Pingos 
. Ognip
. Blockfields
. Patterned Ground
. Thermokarst
. Teracettes
. Solifluction Lobes
. Ice wedges

Question 2

Define Periglacial Environment

Answer 2

. Areas found on the edge of cold environments, such as polar and alpine environment

. The ground is permanently frozen (permafrost)

. Generally high - latitude (up North)areas, that are NOT permanently covered by ice and snow

Question 3

Define Permafrost

Answer 3

. Refers to permanently frozen ground

. Temperatures below the ground remain below 0 degrees for more than two years

. Contain Active Layer

. If water is present in soil, the soil will freeze cementing minerals and organic particles together. Below this is the talik

. Contains Talik (unfrozen ground)

Question 4

Define Active Layer

Answer 4

Top layer of the permafrost

. Frozen during colder winter months and thaws during hotter summer months

Question 5

Define Talik

Answer 5

UNFROZEN ground found below the active layer and frozen ground in permafrost zone

Question 6

Name three types of Permafrost

Answer 6

. Discontinuous permafrost
. Continuous permafrost
. Sporadic permafrost

Question 7

Define Continuous permafrost

Answer 7

. Found in the coldest regions, where permafrost reaches deep in the soil

. Little melting of active layer

. All ground is frozen

Question 8

Define Sporadic Permafrost

Answer 8

. Mean average temperature is just below 0 degrees

. Isolated small pockets of permanently frozen ground found below surface.

. Smaller patches and shorter length of permafrost than discontinuous permafrost

Question 9

Explain Solifluction Lobes

Answer 9

• Refer to process of solifluction in test
  1. ) The process of solifluction produces lobes.
  2. )This is as one section of soil moving downhill moves faster than the soil around it.
  3. ) This could be if one section of the soil on steeper ground, so it flows further. This produces a solifluction lobe that is the shape of a tongue