where in north america would you find a continental arc course hero

Where is the continental shelf located?

Because of the stress that the continental crust is subjected to, metamorphic rocks are frequent. Continent-continent collisions result and big earthquakes as vast slabs of crust crash together. The Appalachian Mountains in Eastern North America are the remains of a massive mountain range formed when North America which collided with Eurasia 250 million years ago, a part of …

How do oceanic plates spread apart at the mid-ocean ridge?

 · Question 2 of 25 4.0 Points Which of the following would not support Continental Drift? A. You notice that the same fossil in Australia and Antarctica. B. You notice that a similar rock formation is found on both the west coast of Africa and the east coast of South America. C. You notice that both North America and Africa have the same type of earthquakes and …

What happened to the continental shelves during the ice age?

Jurassic Period (~200 to 145 Ma): North America rifted apart from Africa and South America, as a result of seafloor spreading. Cretaceous Period (145 to 66 Ma):An oceanic plateau from the Pacific moved northeast, led by a subduction zone and associated island arc, and transform faults bounded the sides of the plate that carried the plateau.

Where does the continental shelf break off?

 · more continental area than today was exposed Question 4 2 out of 2 points Which coast of North America is characterized by the tidal pattern ... Question 14 2 out of 2 points The Atacama Desert in South America is a desert for all of the reasons except Selected ... Course Hero member to access this document. Continue to access. Term. Spring ...

Which crust is subducted below the continental crust?

A piece of oceanic crust is subducted below continental crust.

What is consumed at convergent boundaries?

An equal volume of crust is being consumed at convergent boundaries.

Where do falls occur?

Falls occur rapidly and in areas with high slope, whereas creep occurs slowly in areas with low slope.

How far is the continental shelf from the coast?

According to the UN Convention on the Law of the Sea, every nation has a continental shelf extending no more than 200 nautical miles from the nation's coastline. Map by Sean O'Connor. Oil on the Shelf.

How deep is the water on the continental shelf?

Water depth over the continental shelves averages about 60 meters (200 feet). Sunlight penetrate s the shallow waters, and many kinds of organisms flourish—from microscopic shrimp to giant seaweed called kelp. Ocean currents and runoff from rivers bring nutrient s to organisms that live on continental shelves.

What is the edge of a continent that lies under the ocean called?

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. From the break, the shelf descends toward the deep ocean floor in what is called the continental slope.

What are the valleys that are filled with seawater called?

As huge alpine glacier s moved quickly downhill, they gouged deep, narrow valleys. Now, the valleys are filled with seawater. These narrow, flooded valleys that descend into the continental shelf are known as fjord s. The legal definition of a continental shelf is different than the geographic one.

How low were sea levels during the Ice Age?

During this glacial period, scientists say that sea levels were perhaps 100 meters (330 feet) lower than they are today. The continental shelves between North America and Asia were probably exposed during the Ice Age. Some scientists say that the shelves provided a “ land bridge ” between the two continents.

What is the Congo Canyon?

The Congo Canyon is part of Africa. Formation of a Continental Shelf. Over many millions of years, organic and inorganic materials formed continental shelves. Inorganic material built up as rivers carried sediment —bits of rock, soil, and gravel—to the edges of the continents and into the ocean.

Where are submarine canyons formed?

Often, submarine canyons are formed near the mouth s of rivers. Strong river currents cut deeply into the soft material of the continental shelf, just like they erode rocks above ground.