Page 289 - Ultimate Visual Dictionary (DK)

GLACIERS

Cirque
(corrie)
Firn (compressed
snow)
FEATURES OF A GLACIER Tributary glacier
Arête
(ridge)
Moving ice
U-shaped
valley
Lateral Medial
moraine moraine

Tributary
moraine joins
medial moraine
Subglacial
stream
Gentle Smooth
slope surface
Rock being ICE-FALL
eroded by ice Steep
Slope slope
flattens
Brittle
surface ice
Crevasse
Viscous Rougher
deepens and
flowing ice surface widens
Ice breaks
Englacial into blocks
Ice block
moraine Ice recompresses tilts and twists
Crevasse
U-SHAPED VALLEY
CIRQUE FORMATION FORMATION
Ribbon Horn
lake Firn Material Arête
(compressed loosened (ridge)
snow) by frost Glacier
wedging Cirque
overspills
Fresh
snowfall

EARLY STAGE DURING GLACIATION
Steep Deepened Deep U-shaped
Sediment Moraine pulled back wall cirque valley
Outwash deposited by from ground
plain meltwater Hanging
Glacier valley
Meltwater Base of cirque eroded by Tarn
glacier’s pivoting action
Stream
Rock lip

LATER STAGE AFTER GLACIATION

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