Origins of a Lake.

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Presentation transcript:

Origins of a Lake

I. General Information Definition: A large body of water occupying an inland basin of a low-lying landmass Lakes cover only about 1% of the continents (0.013% of the world’s water) Extremely varied in the origins, size, shape, depth, chemistry and other features

Different Sizes Large Lakes Small Lake

Irregular Shaped Lakes Different shapes Irregular Shaped Lakes Round Lakes

Different Chemistries Very Salty Fresh and Clear

An Earthquake caused a landslide dam forming Lake Serez II. How a Lake is Formed Lakes are constantly being formed and destroyed An Earthquake caused a landslide dam forming Lake Serez

1. Tectonic Activity Tectonic shifts can cause land to change shape and block waterways forming the lake.

Glacier carves massive chunks from the land. 2. Glacial Activity Glacier carves massive chunks from the land. Melted glacier and tributaries fill the huge holes.

Finger Lakes - New York State

Devil’s Lake - Wisconsin

Caldera Lake – a lake where the opening of a volcano once existed 3. Volcanic Activity Caldera Lake – a lake where the opening of a volcano once existed

Spirit Lake BEFORE Mt. St. Helen eruption Spirit Lake AFTER Mt. St. Helens erupted

Man – Made Damns create lakes in flood plains 4. Man – Made Activity Man – Made Damns create lakes in flood plains