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13 cards from this deck
Steep
Vertical erosion
River has limited energy to erode through obstacles
Zigzag pattern when viewed up/downstream
Hard resistant rock above softer rock
Softer rocks erode faster than harder rocks
Soft rock eroded, leaving hard rock unsupported above
At base of waterfall
Creates a steep-sided gorge
By waterfall retreat over extended periods
Water forced into cracks, widening them until pieces break away
Rocks & sediment scrape riverbed/banks, wearing them away
On outer bends where water flows faster
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