Ocean Land Forms

8/2/2019 Ocean Land Forms

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Journey to Bottom of theOcean


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Continent

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Asia

Africa

North America

South America

Antarctica

Europe

Australia

A continent is alarge landmass.

There are sevencontinents on theEarth


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Click on a feature to go thereor click next to continue with

the journey


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We will begin our journey where landmeets the ocean.

Do you know where we are?

Yes. At the beach.

Beaches are the fastest changing partof the ocean. They change with everywave.

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Continental Shelf

There are several partto the continental shelf.

The continental break

The continental slope

The continental rise

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The edge of the continents slope downfrom the shore into the ocean. The partof the continent located under water is

known as the Continental Shelf.

The continental shelf is rich in resourcessuch as marine life, minerals and oil.

For this reason, countries around theworld claim the bordering continentalshelf as part of their territories.


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Continental Slope

The continental slope is asteep slope that connects

the continentalshelf tothe bottom of the oceanfloor. The slope begins

at a depth of around 460feet (140 meters).

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Volcanic Island Arc

Volcanic island arcs are aseries of seamount tall enoughto break the sea surface andform an island.

The Augustine Island Volcano in

Alaska is an example of a volcanicarc.

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http://www.eoearth.org/image/Volcano_seamount_Sonne.jpghttp://www.eoearth.org/image/Volcano_seamount_Sonne.jpghttp://www.eoearth.org/image/Volcano_seamount_Sonne.jpghttp://www.eoearth.org/image/Volcano_seamount_Sonne.jpghttp://www.eoearth.org/image/Volcano_seamount_Sonne.jpghttp://www.eoearth.org/image/Volcano_seamount_Sonne.jpghttp://www.eoearth.org/image/Volcano_seamount_Sonne.jpghttp://www.eoearth.org/image/Volcano_seamount_Sonne.jpghttp://www.eoearth.org/image/Volcano_seamount_Sonne.jpghttp://www.eoearth.org/image/Volcano_seamount_Sonne.jpghttp://www.eoearth.org/image/Volcano_seamount_Sonne.jpghttp://www.eoearth.org/image/Volcano_seamount_Sonne.jpg


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Abyss

The deepest point in the ocean iscalled the abyss

The Mariana Trench is the deepestknown point in the ocean. It is located

in the western part of the PacificOcean near the fourteen MarianaIslands.

The Mariana Trench is a semi-circlethat extends from the northeast to thesouthwest for about two thousand fivehundred fifty meters and is seventykilometers wide.

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Mid Ocean Ridge

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The mid ocean ridge is a series ofmountain ranges on the ocean floor.

They are more than 84,000 kilometers(52,000 miles) in length and they extendthrough the North and South of theAtlantic ocean, the Indian Ocean, and theSouth Pacific ocean.

According to the plate tectonics theory,volcanic rock is added to the sea floor asthe mid-ocean ridge spreads apart.


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Abyssal Plain

Abyssal plains are the vast,flat, sediment-covered

areas of the deep oceanfloor. They are the flattest,most featureless areas onEarth. These flat abyssal

plains occur at depths ofover 6,500 ft (1,980 m)below sea level.

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Seamount

Seamounts are undersea volcanic mountainsrising from the bottom of the sea that do notbreak the water's surface

Seamounts are usually isolated and cone-shaped, often volcanic in origin.

Smaller volcanoes are called sea knolls, andflat-topped seamounts are called guyots.

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Guyot

Guyots are seamounts that have builtabove sea level. Over time erosion bywaves destroyed the top of the seamountresulting in a flattened shape

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Seamount risesabove water

Erosion by wavesflattens the top of themount

The seamountbecomes submergedto form a Guyot


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Ocean Trench

A deep-sea trench is a narrow, elongate,v-shaped depression in the ocean floor.

Trenches are the deepest parts of theocean, and the lowest points on Earth.

They reach depths of nearly 7 mi (10 km)below sea level.

They can be thousands of miles in length,yet as little as 5 mi (8 km) in width.

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Compare continental andoceanic landforms

Continental landform

Canyon

Valley

Volcanic mountain

Mountain Range

Low hills or plains

Oceanic landform

Trench

Rift

Seamount

Mid-ocean ridge

Ocean basin (abyssal plains)


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Sources

http://www.utdallas.edu/~pujana/oceans/guyot.html

http://www.enotes.com/earth-science/abyssal-plains

http://www.answers.com

http://images.google.com/images?um=1&hl=en&rlz=1T4ADBF_enUS279US280&q=ocean+trench+pictures

http://oceanexplorer.noaa.gov/explorations/02galapagos/logs/jun04/jun04.html

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http://www.utdallas.edu/~pujana/oceans/guyot.htmlhttp://www.enotes.com/earth-science/abyssal-plainshttp://www.answers.com/http://images.google.com/images?um=1&hl=en&rlz=1T4ADBF_enUS279US280&q=ocean+trench+pictureshttp://images.google.com/images?um=1&hl=en&rlz=1T4ADBF_enUS279US280&q=ocean+trench+pictureshttp://oceanexplorer.noaa.gov/explorations/02galapagos/logs/jun04/jun04.htmlhttp://oceanexplorer.noaa.gov/explorations/02galapagos/logs/jun04/jun04.htmlhttp://oceanexplorer.noaa.gov/explorations/02galapagos/logs/jun04/jun04.htmlhttp://oceanexplorer.noaa.gov/explorations/02galapagos/logs/jun04/jun04.htmlhttp://images.google.com/images?um=1&hl=en&rlz=1T4ADBF_enUS279US280&q=ocean+trench+pictureshttp://images.google.com/images?um=1&hl=en&rlz=1T4ADBF_enUS279US280&q=ocean+trench+pictureshttp://www.answers.com/http://www.enotes.com/earth-science/abyssal-plainshttp://www.enotes.com/earth-science/abyssal-plainshttp://www.enotes.com/earth-science/abyssal-plainshttp://www.enotes.com/earth-science/abyssal-plainshttp://www.enotes.com/earth-science/abyssal-plainshttp://www.utdallas.edu/~pujana/oceans/guyot.html

Documents

Ocean Land Forms