glaciers & streams part 2
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Glaciers & Streams Part 2. Mr. King. How Glaciers Move. Mountain Side. How Glaciers Move. Cirque. Mountain Side. How Glaciers Move. Cirque. Where Snow Accumulates. Mountain Side. How Glaciers Move. Cirque. Where Snow Accumulates. Mountain Side. How Glaciers Move. Cirque. - PowerPoint PPT PresentationTRANSCRIPT
Glaciers & Streams
Part 2
Glaciers & Streams
Part 2
Mr. KingMr. King
How Glaciers Move
Mountain Side
How Glaciers Move
Mountain Side
Cirque
How Glaciers Move
Mountain Side
CirqueWhere Snow Accumulates
How Glaciers Move
Mountain Side
CirqueWhere Snow Accumulates
How Glaciers Move
Mountain Side
CirqueWhere Snow Accumulates
How Glaciers Move
Mountain Side
CirqueWhere Snow Accumulates
How Glaciers Move
Mountain Side
CirqueWhere Snow Accumulates
How Glaciers Move
Mountain Side
CirqueWhere Snow Accumulates
Rock plucking & grinding
How Glaciers Move
Mountain Side
Cirque
Where Snow Accumulates
Rock plucking & grinding
How Glaciers Move
Mountain Side
Cirque
Where Snow Accumulates
Rock plucking & grinding
Rock & Silt pileTerminal Moraine
How Glaciers Move
Mountain Side
Cirque
Where Snow Accumulates
Rock plucking & grinding
Rock & Silt pileTerminal Moraine
A Glacier which advances has more snow accumulation than lowerMelting and evaporation.
Where snow melts orevaporates
Glacial tillOr milk in river
How Glaciers Move
Mountain Side
Cirque
Where Snow Accumulates
Rock plucking & grinding
Rock & Silt pileTerminal Moraine
A Glacier which advances has more snow accumulation than lowerMelting and evaporation.
Where snow melts orevaporates
Glacial tillOr milk in river
How Glaciers Move
Mountain Side
Cirque
Where Snow Accumulates
Rock plucking & grinding
Rock & Silt pileTerminal Moraine
A Glacier which advances has more snow accumulation than lowerMelting and evaporation.
Where snow melts orevaporates
Glacial tillOr milk in river
How Glaciers Move
Mountain Side
Cirque
Where Snow Accumulates
Rock plucking & grinding
Rock & Silt pileTerminal Moraine
A Glacier which advances has more snow accumulation than lowerMelting and evaporation.
Where snow melts orevaporates
Glacial tillOr milk in river
How Glaciers Move
Mountain Side
Cirque
Where Snow Accumulates
Rock plucking & grinding
Rock & Silt pileTerminal Moraine
A Glacier which advances has more snow accumulation than lowerMelting and evaporation.
Where snow melts orevaporates
Glacial tillOr milk in river
How Glaciers Move
Mountain Side
Cirque
Where Snow Accumulates
Rock plucking & grinding
Rock & Silt pileTerminal Moraine
A Glacier which recedes has less snow accumulation than lowerMelting and evaporation.
Where snow melts orevaporates
Glacial tillOr milk in river
How Glaciers Move
Mountain Side
Cirque
Where Snow Accumulates
Rock plucking & grinding
Rock & Silt pileTerminal Moraine
A Glacier which recedes has less snow accumulation than lowerMelting and evaporation.
Where snow melts orevaporates
Glacial tillOr milk in river
How Glaciers Move
Mountain Side
Cirque
Where Snow Accumulates
Rock plucking & grinding
Rock & Silt pileTerminal Moraine
A Glacier which recedes has less snow accumulation than lowerMelting and evaporation.
Where snow melts orevaporates
Glacial tillOr milk in river
How Glaciers Move
Mountain Side
CirqueWhere Snow Accumulates
Rock plucking & grinding
Rock & Silt pileTerminal Moraine
A Glacier which recedes has less snow accumulation than lowerMelting and evaporation.
Where snow melts orevaporates
Glacial tillOr milk in river
How Glaciers Move
Mountain Side
CirqueWhere Snow Accumulates
Rock plucking & grinding
Rock & Silt pileTerminal Moraine
A Glacier which recedes has less snow accumulation than lowerMelting and evaporation.
Where snow melts orevaporates
Glacial tillOr milk in river
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
Stream Erosion- Young
• Rapids • Waterfalls • No Flood Plain • Tributaries or small
streams connect main river
• Valley Being Deepened
Stream Erosion - Youth/Mature
• V-Shaped Valley
• Beginnings of Flood Plain
• Sand and Gravel Bars
• Sharp Divides
• Relief Reaches Maximum • Valleys stop deepening
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.
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)
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.
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.
Streams - Can you Tell the Age?
AB
CD
Braided Stream