Fluvioglacial Landforms Flashcards
(erosional) meltwater channels
form as meltwater containing rock fragments deepen and widen pre existing river channels
(erosional) moulins
occurs on surface of glacier
meltwater erodes by abrasion through ice surface
creating a circular inlet going deep into the body of the glacier
(depositional) outwash plains
flat spread of till deposited by meltwater streams coming from a glacier
debris deposited when river loses energy
(depositional) eskers
depositional from subglacial meltwater streams
sediment is sorted and stratified
(depositional) kames
irregular mound found at the front of a glacier
created by deposited material (repeatedly)
(depositional) kame terraces
stratified sediment along side a glacier
left on glacier after glacier has retreated
(depositional) varves
sorted and stratified material in bottom of glacial lake
material gathers in layers seasonally
(depositional) kettle holes/lakes
when large block of supraglacial ice calve and drop onto an outwash plain
as glacier retreats the block is left stranded
(processes) hydraulic action
force of the water
(processes) abrasion
stones in transport thrown into bedrock
(processes) corrosion
weak acids in water react and errode
(processes) attrition
rock fragments thrown into eachother
name the erosional features:
-moulins
-meltwater channels
name the depositional features:
-outwash plains
-eskers
-kames
-kame terraces
-varves
-kettle holes/lakes
name the fluvioglacial processes:
abrasion
attrition
corrosion
hydraulic action
