Lake Formation

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Lake Formation

• Hydrology
• PLHS
• D. Blanck, MS

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1. Kettle Lakes

• Formed during the process of glacial retreat.

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2. Tarn Lakes

• Carved through glacial erosion (plucking)

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3. Natural Reservoirs

• The natural drainage of a river is blocked by
  debris
• Volcanic, Landslide, Beaver Dam, Ice

Glacial Lake Agassiz was an Ice Block reservoir.
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3a. Manmade reservoirs

• Formed after the construction of flood control or
  hydroelectric dams

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4. Oxbow lake

• Cut-off river meanders

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5. Rift Zone lake

• Form in divergent plate boundary depressions

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6. Crater Lakes

• Form in impact craters and volcanic calderas

Manicouagan Lake, Quebec. Formed 200 million
years ago - Impact
Crater Lake, Mt. Mazama, Oregon - Volcanic
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7. Karst Lake

• Water fills a sinkhole after the roof of a
  limestone cave collapses