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Geological Features at Sea and on Land. Pangea Nearly 100 years ago Alfred Wegner thought that the map looked like a giant jigsaw puzzel. Nearly 100 years.

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Presentation on theme: "Geological Features at Sea and on Land. Pangea Nearly 100 years ago Alfred Wegner thought that the map looked like a giant jigsaw puzzel. Nearly 100 years."— Presentation transcript:

1 Geological Features at Sea and on Land

2 Pangea Nearly 100 years ago Alfred Wegner thought that the map looked like a giant jigsaw puzzel. Nearly 100 years ago Alfred Wegner thought that the map looked like a giant jigsaw puzzel. This thinking lead to the development of the Theory of Plate Tectonics! This thinking lead to the development of the Theory of Plate Tectonics!

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4 Ocean Topography Main Features

5 Topography Is the study of Earth's surface shape and features. Is the study of Earth's surface shape and features. Ocean topography is the study of the ocean floor and the features. Ocean topography is the study of the ocean floor and the features.

6 Shoreline A shore or shoreline is the fringe of land at the edge of a large body of water, such as an ocean, sea, or lake. A shore or shoreline is the fringe of land at the edge of a large body of water, such as an ocean, sea, or lake. In physical oceanography, a shore is the wider fringe that is geologically modified by the action of the body of water past and present, while the beach is at the edge of the shore. In physical oceanography, a shore is the wider fringe that is geologically modified by the action of the body of water past and present, while the beach is at the edge of the shore.

7 Abyssal hills Hills along the ocean floor. Hills along the ocean floor. Ranging in height and diameter, these hills are much larger then the hills we see on land. 100-2000 meters high and several KM across. Ranging in height and diameter, these hills are much larger then the hills we see on land. 100-2000 meters high and several KM across.

8 Abyssal plains Abyssal plains are flat or very gently sloping areas of the deep ocean basin floor. Abyssal plains are flat or very gently sloping areas of the deep ocean basin floor. They generally lie between the foot of a continental rise and a mid-oceanic ridge. They generally lie between the foot of a continental rise and a mid-oceanic ridge.

9 Sea cave A sea cave, or littoral cave, is a type of cave formed primarily by the wave action of the sea, or erosion!. A sea cave, or littoral cave, is a type of cave formed primarily by the wave action of the sea, or erosion!. Sea caves are found throughout the world, actively forming along present coastlines and as relict sea caves on former coastlines. Sea caves are found throughout the world, actively forming along present coastlines and as relict sea caves on former coastlines.

10 The Ocean Floor Brain Pop: The Ocean Floor Brain Pop: The Ocean Floor http://www.brainpop.com/science/earthsy stem/oceanfloor/ http://www.brainpop.com/science/earthsy stem/oceanfloor/ http://www.brainpop.com/science/earthsy stem/oceanfloor/ http://www.brainpop.com/science/earthsy stem/oceanfloor/

11 Continental shelf The continental shelf is the extended perimeter of each continent and associated coastal plain. The continental shelf is the extended perimeter of each continent and associated coastal plain. This area was part of the continent during the glacial periods, but is undersea during interglacial periods. This area was part of the continent during the glacial periods, but is undersea during interglacial periods.

12 Continental slope The descending slope which connects the sea floor to the Continental shelf. The descending slope which connects the sea floor to the Continental shelf. It is still considered to be part of the Continent. It is still considered to be part of the Continent.

13 Sea Mount A seamount is a mountain rising from the ocean seafloor that does not reach to the water's surface (sea level). A seamount is a mountain rising from the ocean seafloor that does not reach to the water's surface (sea level). They are also called underwater volcanoes because are typically formed from extinct volcanoes, that rise abruptly. They are also called underwater volcanoes because are typically formed from extinct volcanoes, that rise abruptly.

14 Guyot A guyot also known as a tablemount, is a flat-topped seamount. Their flatness is due to erosion by waves, winds, and atmospheric processes. A guyot also known as a tablemount, is a flat-topped seamount. Their flatness is due to erosion by waves, winds, and atmospheric processes.

15 Mid-Ocean ridge A mid-ocean ridge is an underwater mountain range, formed by plate tectonics. A mid-ocean ridge is an underwater mountain range, formed by plate tectonics. It is usually an oceanic spreading center, which is responsible for seafloor spreading. It is usually an oceanic spreading center, which is responsible for seafloor spreading.

16 Trench The oceanic trenches are hemispheric- scale long but narrow topographic depressions of the sea floor. The oceanic trenches are hemispheric- scale long but narrow topographic depressions of the sea floor. They are also the deepest parts of the ocean floor. They are also the deepest parts of the ocean floor.

17 Mariana Trench Is the deepest part of the world's oceans, and the deepest location on the surface of the Earth's crust. It has a maximum depth of about 10,911meters, or 11 kilometers. Is the deepest part of the world's oceans, and the deepest location on the surface of the Earth's crust. It has a maximum depth of about 10,911meters, or 11 kilometers.

18 Oceanic Island One type of oceanic island is found in a volcanic island arc. These islands arise from volcanoes where the subduction of one plate under another is occurring. One type of oceanic island is found in a volcanic island arc. These islands arise from volcanoes where the subduction of one plate under another is occurring.

19 Atoll An atoll is an island of coral that encircles a lagoon partially or completely. An atoll is an island of coral that encircles a lagoon partially or completely.

20 Volcanic fissure A linear volcanic vent through which lava erupts, usually without any explosive activity. The vent is usually a few meters wide and may be many kilometers long A linear volcanic vent through which lava erupts, usually without any explosive activity. The vent is usually a few meters wide and may be many kilometers long

21 Hydrothermal Vent A hydrothermal vent is a fissure in a planet's surface from which geothermal heated water issues. A hydrothermal vent is a fissure in a planet's surface from which geothermal heated water issues. Hydrothermal vents are commonly found near volcanically active places, areas where tectonic plates are moving apart, ocean basins, and hotspots. Hydrothermal vents are commonly found near volcanically active places, areas where tectonic plates are moving apart, ocean basins, and hotspots.

22 Answer the Following Questions: 1. Compare the formation of Seamounts and Volcanoes. 2. Explain the relationship between river valleys and sea canyons. 3. List 2 ways in which basins are formed. 4. How does water enter lakes? 5. What 3 Oceans does Canada’s water flow into?

23 Geological Features Project Working either on your own or with a partner you are going to create a 3-D model of the geological features found on the ocean floor. Working either on your own or with a partner you are going to create a 3-D model of the geological features found on the ocean floor. You must include 10 different geological features that are found on the ocean floor. (If you are working by yourself you only have to include 5) You must include 10 different geological features that are found on the ocean floor. (If you are working by yourself you only have to include 5)

24 Today… Create a diagram of your 3-D model. Create a diagram of your 3-D model. This diagram must include all of the features that you plan to include. This diagram must include all of the features that you plan to include. It is essentially a map of what your model will look like. It is essentially a map of what your model will look like. I have to approve this plan in order for you to start building your model. I have to approve this plan in order for you to start building your model. You will have to hand this in with the final project and it will be assessed. You will have to hand this in with the final project and it will be assessed.

25 What I am looking for… Complete diagram with all features. Complete diagram with all features. Neat and Labelled features Neat and Labelled features Coloured diagram Coloured diagram A description of each feature must be included on a separate piece of paper. A description of each feature must be included on a separate piece of paper. ** You will be using this to create your model so make it realistic. I will be looking to see that your model resembles your diagram.

26 List of Geological Features Continental Shelf Continental Shelf Continental Slope Continental Slope Seamount Seamount Mid ocean ridge (mountain range) Mid ocean ridge (mountain range) Sea Canyons Sea Canyons Trenches Trenches Guyots Guyots Abyssal Hills Abyssal Hills Abyssal Plains Abyssal Plains Sea Cave Sea Cave Atoll Atoll Oceanic Islands Oceanic Islands Hydrothermal Vent Hydrothermal Vent Volcanic Fissure Volcanic Fissure


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