Glaciers

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Glaciers StreamsPart 2

• Mr. King

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How Glaciers Move
Mountain Side
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How Glaciers Move
Cirque
Mountain Side
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How Glaciers Move
Cirque
Where Snow Accumulates
Mountain Side
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How Glaciers Move
Cirque
Where Snow Accumulates
Mountain Side
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How Glaciers Move
Cirque
Where Snow Accumulates
Mountain Side
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How Glaciers Move
Cirque
Where Snow Accumulates
Mountain Side
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How Glaciers Move
Cirque
Where Snow Accumulates
Mountain Side
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How Glaciers Move
Cirque
Where Snow Accumulates
Mountain Side
Rock plucking grinding
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How Glaciers Move
Cirque
Where Snow Accumulates
Mountain Side
Rock plucking grinding
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How Glaciers Move
Cirque
Where Snow Accumulates
Mountain Side
Rock plucking grinding
Rock Silt pile Terminal Moraine
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How Glaciers Move
Where snow melts or evaporates
Cirque
Where Snow Accumulates
Glacial till Or milk in river
Mountain Side
Rock plucking grinding
Rock Silt pile Terminal Moraine
A Glacier which advances has more snow
accumulation than lower
Melting and evaporation.
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How Glaciers Move
Where snow melts or evaporates
Cirque
Where Snow Accumulates
Glacial till Or milk in river
Mountain Side
Rock plucking grinding
Rock Silt pile Terminal Moraine
A Glacier which advances has more snow
accumulation than lower
Melting and evaporation.
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How Glaciers Move
Where snow melts or evaporates
Cirque
Where Snow Accumulates
Glacial till Or milk in river
Mountain Side
Rock plucking grinding
Rock Silt pile Terminal Moraine
A Glacier which advances has more snow
accumulation than lower
Melting and evaporation.
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How Glaciers Move
Where snow melts or evaporates
Cirque
Where Snow Accumulates
Glacial till Or milk in river
Mountain Side
Rock plucking grinding
Rock Silt pile Terminal Moraine
A Glacier which advances has more snow
accumulation than lower
Melting and evaporation.
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How Glaciers Move
Where snow melts or evaporates
Cirque
Where Snow Accumulates
Glacial till Or milk in river
Mountain Side
Rock plucking grinding
Rock Silt pile Terminal Moraine
A Glacier which advances has more snow
accumulation than lower
Melting and evaporation.
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How Glaciers Move
Where snow melts or evaporates
Cirque
Where Snow Accumulates
Glacial till Or milk in river
Mountain Side
Rock plucking grinding
Rock Silt pile Terminal Moraine
A Glacier which recedes has less snow
accumulation than lower
Melting and evaporation.
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How Glaciers Move
Where snow melts or evaporates
Cirque
Where Snow Accumulates
Glacial till Or milk in river
Mountain Side
Rock plucking grinding
Rock Silt pile Terminal Moraine
A Glacier which recedes has less snow
accumulation than lower
Melting and evaporation.
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How Glaciers Move
Where snow melts or evaporates
Cirque
Where Snow Accumulates
Glacial till Or milk in river
Mountain Side
Rock plucking grinding
Rock Silt pile Terminal Moraine
A Glacier which recedes has less snow
accumulation than lower
Melting and evaporation.
20
How Glaciers Move
Where snow melts or evaporates
Cirque
Where Snow Accumulates
Glacial till Or milk in river
Mountain Side
Rock plucking grinding
Rock Silt pile Terminal Moraine
A Glacier which recedes has less snow
accumulation than lower
Melting and evaporation.
21
How Glaciers Move
Where snow melts or evaporates
Cirque
Where Snow Accumulates
Glacial till Or milk in river
Mountain Side
Rock plucking grinding
Rock Silt pile Terminal Moraine
A Glacier which recedes has less snow
accumulation than lower
Melting and evaporation.
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Glacial Stream Erosion

• Glaciers erode a mountain side and create a U
  shaped valley
  
• Streams the flow down a steep gradiant or slope
  create a V shaped valley
  

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Stream Erosion- Young

• Rapids
• Waterfalls
• No Flood Plain
• Tributaries or small streams connect main river
• Valley Being Deepened

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Stream Erosion - Youth/Mature

• V-Shaped Valley
• Beginnings of Flood Plain
• Sand and Gravel Bars
• Sharp Divides
• Relief Reaches Maximum
• Valleys stop deepening

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Stream Erosion - Mature/Old age

• Valley has flat bottom
• Narrow Flood Plain
• Divides begin to round off
• Relief diminishes
• Sediment builds up, flood plain widens
• River begins to meander
• Lots of Disagreement from here on some
  geologists believe slopes stay steep but simply
  retreat.
  

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Stream Erosion - Old Age

• Very Wide Flood Plain
• Land worn down to flat surface (Peneplain)
• Resistant rocks form residual hills (Monadnocks)
  
  
• Pronounced River Meanders
• Cut-off Meanders (Ox-bow lakes)

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More Stream Erosion

• Rivers meander because the landscape is flat.
• Some Landscapes are flat because they are
  extremely ancient.
  
• Other Landscapes are flat for other reasons, like
  recent sediment deposition.
  

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Rejuvenation of a stream

• Uplift of Land (Lowering of Sea Level, sometimes
  greater stream flow) causes stream to speed up
  and cut deeper.
  
• Stream valley takes on youthful characteristics
  but retains features of older stages as well.
  
• Can happen at any point in the cycle.

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Streams - Can you Tell the Age?
A
B
D
C
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Braided Stream