Unit 4 Glacial & fluvioglacial deposition

Lateral moraine

Material transported and deposited along the edge of valley glaciers

push moraine

material deposited by a glacier that has receded but then advanced again

terminal moraine

material deposited at the points marking the maximum advance of a glacier.

drumlin

A long mound of till that is smoothed in the direction of the glacier's flow.. shaped under ice.

medial moraine

Material deposited in the centre of valley where two valley glaciers

varves

alternate layers of fine and coarse material found in lakes

recessional moraine

material deposited by retreating glacier at points where it stood still

esker

long ridge of material deposited by a meltwater stream flowing beneath a glacier

moraine

A ridge formed by the till deposited at the edge of a glacier.

kame

a steep-sided mound of sand and gravel deposited by a melting ice sheet.

kame terrace

Depositional feature along valley sides deposited as valley glaciers melt

outwash plain

Material deposited by meltwater in front of ice

till

unsorted material deposited directly by glacial ice and showing no stratification or sorting

entrained

debris within a glacier

Englacial debris

sediment carried within the body of a glacier

Subglacial debris

material transported at the base of the ice of a glacier

Supraglacial debris

Material transported on the surface of the glacier

attrition

rocks carved by meltwater knock against each other weathering them down (clasts become rounded)

stratification

layering of rocks into similar sizes

sorting

arrangement of rock fragments into similar sizes