What type of boundary is the Alaska Earthquake?
convergent plate boundary Plafker had confirmed that the earthquake occurred in a subduction zone. That's a type of convergent plate boundary where one plate dives beneath another. Alaska's long southern coastline marks where the Pacific Plate, moving north, dives beneath the North American Plate.
What type of plate boundary is responsible for the high concentration of earthquakes in Alaska?
Subduction zones like southern Alaska's occur throughout the world, and the 1964 Alaska earthquake was the first to be generally understood by earth scientists as having occurred on a subduction zone interface: the slip was along the gently dipping boundary, or “megathrust fault,” between the denser downgoing oceanic …
What type of plate boundary does Alaska sit near quizlet?
For example, the Aleutian Islands of Alaska. Found at a Oceanic-Oceanic Convergent Plate Boundary.
Is Alaska a divergent boundary?
And finally we have series of active volcanoes which occupy the Aleutian Island an Alaska peninsular. So Alaska is situated in convergent zone.
What is convergent boundary?
When two plates come together, it is known as a convergent boundary. The impact of the colliding plates can cause the edges of one or both plates to buckle up into a mountain ranges or one of the plates may bend down into a deep seafloor trench.
What is the tectonic setting of Alaska?
Alaskan tectonics are dominated by the Pacific-North American plates. The megathrust boundary between the plates results in both the 4,000-km-long Aleutian Trench and in the arc of active volcanoes that lie subparallel to the trench.
Which type of convergent plate boundary formed the Aleutian Islands of Alaska?
ocean-ocean convergent zones Examples of ocean-ocean convergent zones are subduction of the Pacific Plate south of Alaska (creating the Aleutian Islands) and under the Philippine Plate, where it creates the Marianas Trench, the deepest part of the ocean.
What plate boundary formed the Aleutian Islands?
In southwestern Alaska, those two plates meet head on, and the Pacific plate sinks beneath the North American plate. In this subduction zone, some of the ocean plate melts and the molten rock pushes to the surface in a string of 40 active volcanoes, forming the Aleutian Islands.
What type of tectonic boundary likely makes up the southern coast of Alaska?
The Aleutian Trench (or Aleutian Trough) is an oceanic trench along a convergent plate boundary which runs along the southern coastline of Alaska and the Aleutian islands.
What kind of plates are in Alaska?
Alaskan tectonics are dominated by the Pacific-North American plates. The megathrust boundary between the plates results in both the 4,000-km-long Aleutian Trench and in the arc of active volcanoes that lie subparallel to the trench.
What is a divergent boundary?
A divergent boundary occurs when two tectonic plates move away from each other. Along these boundaries, earthquakes are common and magma (molten rock) rises from the Earth's mantle to the surface, solidifying to create new oceanic crust.
Where is the divergent boundary located?
mid-ocean oceanic ridges Divergent boundaries are spreading boundaries, where new oceanic crust is created to fill in the space as the plates move apart. Most divergent boundaries are located along mid-ocean oceanic ridges (although some are on land).
What tectonic feature are the Aleutian Islands of Alaska?
In southwestern Alaska, those two plates meet head on, and the Pacific plate sinks beneath the North American plate. In this subduction zone, some of the ocean plate melts and the molten rock pushes to the surface in a string of 40 active volcanoes, forming the Aleutian Islands.
Is Alaska a subduction zone?
Alaska has been a site of subduction and terrane accretion since the mid-Jurassic. The area features abundant seismicity, active volcanism, rapid uplift, and broad intraplate deformation, all associated with subduction of the Pacific plate beneath North America.
What type of plate boundary makes the earthquakes along the Aleutian Islands of Alaska?
convergent plate boundary The Aleutian Trench (or Aleutian Trough) is an oceanic trench along a convergent plate boundary which runs along the southern coastline of Alaska and the Aleutian islands.
What is convergent boundary example?
Examples of continent-continent convergent boundaries are the collision of the India Plate with the Eurasian Plate, creating the Himalaya Mountains, and the collision of the African Plate with the Eurasian Plate, creating the series of ranges extending from the Alps in Europe to the Zagros Mountains in Iran.
Where are convergent boundaries located?
In the ocean basins, convergent plate margins are marked by deep trenches in the sea floor. The convergent plate boundaries that occur on continents are the collisional mountain belts.
Where does convergent boundary occur?
Convergent boundaries occur between oceanic-oceanic lithosphere, oceanic-continental lithosphere, and continental-continental lithosphere. The geologic features related to convergent boundaries vary depending on crust types.
What type of boundary is found at the Aleutian Islands in Alaska?
convergent plate boundary The Aleutian Trench (or Aleutian Trough) is an oceanic trench along a convergent plate boundary which runs along the southern coastline of Alaska and the Aleutian islands.
Where is divergent boundary located?
mid-ocean oceanic ridges Divergent boundaries are spreading boundaries, where new oceanic crust is created to fill in the space as the plates move apart. Most divergent boundaries are located along mid-ocean oceanic ridges (although some are on land).
What is the example of divergent boundary?
A divergent boundary occurs when two tectonic plates move away from each other. Along these boundaries, earthquakes are common and magma (molten rock) rises from the Earth's mantle to the surface, solidifying to create new oceanic crust. The Mid-Atlantic Ridge is an example of divergent plate boundaries.
What are divergent boundaries?
A divergent boundary occurs when two tectonic plates move away from each other. Along these boundaries, earthquakes are common and magma (molten rock) rises from the Earth's mantle to the surface, solidifying to create new oceanic crust.
Where does a divergent boundary occur?
Divergent boundaries. Divergent boundaries occur along spreading centers where plates are moving apart and new crust is created by magma pushing up from the mantle.
Where are divergent boundaries located?
mid-ocean oceanic ridges Divergent boundaries are spreading boundaries, where new oceanic crust is created to fill in the space as the plates move apart. Most divergent boundaries are located along mid-ocean oceanic ridges (although some are on land).