What is the outer edge of the continental margin?
This portion of the seafloor is called the continental rise, and marks the outermost zone of the continental margin.
Where is the continental edge?
A continental shelf is the edge of a continent that lies under the ocean. Continents are the seven main divisions of land on Earth. A continental shelf extends from the coastline of a continent to a drop-off point called the shelf break.
How do you define continental shelf?
The term "continental shelf" is used by geologists generally to mean that part of the continental margin which is between the shoreline and the shelf break or, where there is no noticeable slope, between the shoreline and the point where the depth of the superjacent water is approximately between 100 and 200 metres.
What part of the continental margin marks the true edge of the continent quizlet?
The portion of the continental margin that marks the true edge of the continent is the: continental slope.
Where do the continental shelves end?
The shelf usually ends at a point of increasing slope (called the shelf break). The sea floor below the break is the continental slope. Below the slope is the continental rise, which finally merges into the deep ocean floor, the abyssal plain.
What is part of the continental margin?
The continental rise, continental slope, and continental shelf are the three basic components that actually make the entire structure of continental margins. The continental slopes and the continental shelves are structural constituents of continents even though they are below the surface of sea.
Where does the Outer Continental Shelf end?
The U.S. Outer Continental Shelf (OCS) includes the area between state jurisdiction to 200 nautical miles (nm) from shore. State jurisdiction over the seafloor extends from the shoreline out to 3 nm, except for Texas and the Florida Gulf Coast, which extend out to 9 nm.
Where does the continental shelf end?
the shelf break Structure. A continental shelf typically extends from the coast to depths of 100–200 metres (330–660 feet). It is gently inclined seaward at an average slope of about 0.1°. In nearly all instances, it ends at its seaward edge with an abrupt drop called the shelf break.
What is the continental shelf quizlet?
Continental shelf. a gently sloping, shallow area of the ocean floor that extends outward from the edge of a continent.
What is true of the continental shelf?
A continental shelf is a portion of a continent that is submerged under an area of relatively shallow water known as a shelf sea. Much of these shelves were exposed by drops in sea level during glacial periods. The shelf surrounding an island is known as an insular shelf.
Which portion of the continental margin are the most biologically rich areas of the ocean?
The continental shelf The continental shelf is the shallowest part of the continental margin. Although they only make up 8% of the Earth's ocean surface area, they are the most biologically rich part of the ocean containing the majority of the sea life.
Where is the continental shelf located quizlet?
the zone of the ocean floor that separates the thin oceanic crust from thick continental crust. Together, the continental shelf, continental slope, and continental rise are called the continental margin. an underwater feature found between the continental slope and the abyssal plain.
What is beyond the continental shelf?
This system is an expression of the edge of the continental crustal block. Beyond the shelf-slope break, the continental crust thins quickly, and the rise lies partly on the continental crust and partly on the oceanic crust of the deep sea.
What is the continental margin quizlet?
Continental margin. the zone of the ocean floor that separates the thin oceanic crust from thick continental crust. Together, the continental shelf, continental slope, and continental rise are called the continental margin.
What is the US outer continental shelf?
The U.S. Outer Continental Shelf (OCS) includes the area between state jurisdiction to 200 nautical miles (nm) from shore. State jurisdiction over the seafloor extends from the shoreline out to 3 nm, except for Texas and the Florida Gulf Coast, which extend out to 9 nm.
What does the Outer Continental Shelf Lands Act do?
The most important legislation for BOEM is the Outer continental shelf Lands Act (OCSLA), which Congress enacted in 1953. The primary purpose of OCSLA is to facilitate the federal government's leasing of its offshore mineral resources and energy resources.
What are the active continental margins quizlet?
Active Continental Margins- where the oceanic lithosphere is being sub ducted beneath the continent. Often associated with deep ocean trenches. Located primarily around the Pacific Ocean. Sediments and rocks can be scraped from the descending plate and accumulate on the continental plate as an accretionary wedge.
Where are active continental margins located?
west coast of An active continental margin is found on the leading edge of the continent where it is crashing into an oceanic plate. An excellent example is the west coast of South America. Active margins are commonly the sites of tectonic activity: earthquakes, volcanoes, mountain building, and the formation of new igneous rock.
Which area is the boundary between continental and oceanic crust quizlet?
1) Continental margins are boundaries between continental crust and oceanic crust.
Where does the outer continental shelf end?
The U.S. Outer Continental Shelf (OCS) includes the area between state jurisdiction to 200 nautical miles (nm) from shore. State jurisdiction over the seafloor extends from the shoreline out to 3 nm, except for Texas and the Florida Gulf Coast, which extend out to 9 nm.
What is the Outer Continental Shelf Lands Act coverage endorsement?
Outer Continental Shelf Lands Act (OCSLA) of 1953 — extends the benefits of the Longshore and Harbor Workers' Compensation Act (LHWCA) to workers injured or killed upon fixed structures (e.g., oil well platforms) that are permanently attached to the outer continental shelf for the purpose of natural resource …
Which US federal agency is responsible for the Outer Continental Shelf Lands Act and managing the offshore wind lease areas?
The most important legislation for BOEM is the Outer continental shelf Lands Act (OCSLA), which Congress enacted in 1953. The primary purpose of OCSLA is to facilitate the federal government's leasing of its offshore mineral resources and energy resources.
What is the continental margin made up of?
Continental margins are made of thick accumulations of sedimentary rock, the type of rock in which oil and gas generally occur.
What is the name of the boundary between the continental shelf and the continental slope?
continental margin The continental margin, between the continental shelf and the abyssal plain, comprises a steep continental slope, surrounded by the flatter continental rise, in which sediment from the continent above cascades down the slope and accumulates as a pile of sediment at the base of the slope.
Where is the boundary between continental crust and oceanic crust?
Today, tectonic activity is responsible for the formation (and destruction) of crustal materials. Earth's crust is divided into two types: oceanic crust and continental crust. The transition zone between these two types of crust is sometimes called the Conrad discontinuity.
What is Jones Act coverage?
Boat Insurance policies provide coverage for the Jones Act. The Jones Act is a US federal statute that provides a means for crew members, who are injured as a result of negligence, to recover for damages caused by injury. It is the maritime version of workers compensation.
What is the leasing term for offshore oil exploration on the Outer Continental Shelf OCS )?
Section 18 of the OCS Lands Act, requires the Secretary of the Interior to prepare an oil and gas leasing program that consists of a 5-year schedule of proposed lease sales that shows the size, timing, and location of leasing activity as precisely as possible.
What plate boundary is a continental shelf?
divergent plate boundary i. The passive continental margins are formed under divergent plate boundary setting. These are aseismic (less seismic) and often referred as the Atlantic-type margins having a distinct transition zone between the continental and oceanic crustal regions.
What zone is the continental shelf in?
Epipelagic Zone. The Epipelagic Zone, also known as the 'Sunlight Zone' is the region of the ocean that sits on the continental shelf. It extends from the surface down to 200 m.
What is the border between two tectonic plates called?
The area where two tectonic plates touch is called the plate boundary, and earthquakes occur most often along these borders.