Plate Tectonics 2

oceanic crust

thinner, more dense, younger crust making ocean floor

San Francisco Earthquake

A 1906 earthquake that destroyed property and set off fires that burned for days. 1,000 people died. Triggered by movement in a transform boundary.

Fault

A break in the earth's crust

Ring of Fire

A circle of volcanoes surrounding the Pacific Ocean.

San Andreas Fault

A major geological fault in California formed by a sliding transform boundary.

transform plate boundary

A plate boundary where two plates move past each other in opposite directions

Convergent Plate Boundary

A tectonic plate boundary where two plates collide, come together, or crash into each other.

Magma

Molten rock beneath the earth's surface

Oceanic-Continental Convergent Plate boundary

Occurs when an oceanic and a continental plate collide. The oceanic crust will subduct because it is older, colder, and denser than the continental crust. Deep Ocean Trenches, Coastal Mountains, Earthquakes and Volcanoes occur at this boundary.

Continental-Continental Convergent Plate Boundary

Occurs where two plates carrying continental crust push together. Since the plates are the same density neither plate subducts. Continental Mountains, Earthquakes, and High Plateaus occur at this boundary.

Cascadia Subduction Zone

Oregon/Washingtons convergent boundary. Where the Juan de Fuca plate subducts under the North American plate, forming the cascade volcanoes.

Himalayan Mountain Range

Tallest mountains in the world located in south asia, made from continental-continental convergent plate boundary, the India Plate colliding with the Eurasian Plate.

subduction zone

The region where oceanic plates sink down into the asthenosphere.

earthquake

The shaking that results from the movement of rock beneath Earth's surface. These happen when tectonic plates slip and enormous amounts of energy is given off.

Volcanoes

an opening in the Earth's crust through which molten lava, ash, and gases are ejected.

Trench (subduction zone)

the region where an oceanic plate sinks down into the asthenosphere at a convergent boundary, usually between continental and oceanic plates

continental crust

thicker, less dense, older crust making the continents