Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Ocean Park Hong Kong wikipedia , lookup
Indian Ocean Research Group wikipedia , lookup
Marine debris wikipedia , lookup
Sea in culture wikipedia , lookup
Ecosystem of the North Pacific Subtropical Gyre wikipedia , lookup
Southern Ocean wikipedia , lookup
Pacific Ocean wikipedia , lookup
Marine pollution wikipedia , lookup
Geological Features at Sea and on Land Topography Is the study of Earth's surface shape and features. Ocean topography is the study of the ocean floor and the features. Ocean Topography Main Features 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. 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. Abyssal hills 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. Abyssal plains 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. Sea cave 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. The Ocean Floor Brain Pop: The Ocean Floor http://www.brainpop.com/science/earthsy stem/oceanfloor/ Continental shelf 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. Continental slope The descending slope which connects the sea floor to the Continental shelf. It is still considered to be part of the Continent. Sea Mount 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. 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. Mid-Ocean ridge 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. Trench The oceanic trenches are hemisphericscale long but narrow topographic depressions of the sea floor. They are also the deepest parts of the ocean floor. 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. 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. Atoll An atoll is an island of coral that encircles a lagoon partially or completely. 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 Hydrothermal Vent 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.