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10 cards from this deck
Assemblage of features built up over vast timescales
Last 2.58 million years
100,000-year rhythm
Eight separate glacial periods
Wide, shallow rivers split & rejoin around sediment islands
Rocks shaped & polished by wind-blown sand & ice particles
Fine wind-blown sediment in thick layers
Move rapidly, actively erode & deposit, quickly reshape terrain
Sharp ridges between valleys
Tributary valleys left 'hanging' above main valley
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