The Oceans of the World 13.1. The Pacific Ocean Largest Circular Shape Average Depth: 4.1 km Deepest...
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![Page 1: The Oceans of the World 13.1. The Pacific Ocean Largest Circular Shape Average Depth: 4.1 km Deepest Ocean Size: –181,344 sq km.](https://reader036.fdocuments.in/reader036/viewer/2022062517/56649e7d5503460f94b7f3a1/html5/thumbnails/1.jpg)
The Oceans of the World
13.1
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The Pacific Ocean
• Largest• Circular Shape• Average Depth: 4.1
km• Deepest Ocean• Size:
– 181,344 sq km
![Page 3: The Oceans of the World 13.1. The Pacific Ocean Largest Circular Shape Average Depth: 4.1 km Deepest Ocean Size: –181,344 sq km.](https://reader036.fdocuments.in/reader036/viewer/2022062517/56649e7d5503460f94b7f3a1/html5/thumbnails/3.jpg)
Pacific
• Seas:– Japan– Bering– Coral– S. China
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Pacific Ocean
• Shape– Circular– Trenches all around the edges
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Pacific Ocean
• Ridge– East Pacific Rise
• Extends N to the Gulf of California
http://ace.acadiau.ca/science/geol/rraeside/quizzes/worldmap3p.htm
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Pacific Ocean
• Ridge Features– No central rift valley– Easter Island & Galapagos are part of this
volcanic mountain chain
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Tectonic Activity within the Pacific Ocean
• Seismic activity along the edges of the ocean
• “Ring of Fire”
• Earthquakes along edges of Pacific Plate
• Volcanoes along edges of Pacific Plate
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Trenches of the Pacific
• Marianas Trench:– 2,500 m long– 11,033 m deep ~ 7 miles deep– Deepest place on earth– East of Philippines
• Trenches mark the boundary between the ocean and continental crust
• Trenches occur at subduction zones
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The Atlantic Ocean
• Size: 94,314 sq km• Avg. Depth 3.8 km• Seas within the
ocean:– Mediterranean– Caribbean– Baltic– Gulf of Mexico
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Atlantic Ocean
• Shape of the Ocean:– Narrow– Long 6,800 mi long
north to south
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Atlantic Ocean• Ridge:
– Mid-Atlantic Ridge– Symmetrical on each side– Sea floor spreading occurs here– Longest chain of volcanic mountains– Features:
• Fractured• rift is 2000 m lower than mountains
http://www.ocean.udel.edu/kiosk/bsmoker.html
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Tectonic Activity within the Atlantic Ocean
• Earthquakes occur at the center of the rift
• http://www.whoi.edu/oceanus/viewArticle.do?id=2394&archives=true
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Geographic Features of the Atlantic Ocean
• Abyssal plains– Flat with sedimentary
deposits
• Sea mounts• Coral atolls
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Trenches of the Atlantic
• Sandwich Trench South America
• Puerto Rico Trench– 8648 m deep– 1,500 km long
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Indian Ocean
• Size:– 74,118 sq km
• Average depth: 3.8 km
• Seas: – Arabian sea
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Indian Ocean
• Shape of the ocean:– Triangular
http://ace.acadiau.ca/science/geol/rraeside/quizzes/worldmap3i.htm
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Indian Ocean Ridge
• Mid Indian Ridge is shaped like:
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Indian Ocean Ridge
• Rugged
• Seismically active – Earthquakes
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Features of the Indian ocean floor
• Abyssal plains
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Trenches of the Indian Ocean
• Java Trench:– 4,500 km long– 7,725 m deep
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Arctic Ocean
• Size: 12,257 sq km
• Average Depth: 1.1 km
• Shape: circular
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Ridges of the Arctic Ocean
• Alpha
• Lomonosov
• Mid-Atlantic
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Geographic Features of the Arctic Ocean
• 3 basins
• Eurasian Basin is the deepest point: 5,450 m
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Your turn:
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Answers:
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Add the Seas to your map