Tectonic Processes.

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Presentation transcript:

Tectonic Processes

3 Boundary Types Divergent boundaries Convergent boundaries, and A boundary exists between two plates that have interacted . There are three types of boundaries that geologists observe. Divergent boundaries Convergent boundaries, and Transform/Sliding boundaries.

As the giant plates move, whether they are diverging [pulling apart] converging [coming together] or sliding [transform], tremendous energies are unleashed resulting in tremors that transform Earth’s surface. No single plate can move without affecting others, and the activity of one can influence another thousands of miles away

1.Divergent Boundaries Divergence: When plates move apart At divergent boundaries new crust is created as two or more plates pull away from each other. 2 types: oceanic and continental

Diagram for your notes

Divergent Plate Boundary - Oceanic Divergent boundaries happen when two ocean plates move apart. When they move away from each other, they leave a crack in the ocean floor. Lava flows out of the crack and makes new land (rock).

Divergent Plate Boundary - Oceanic

Divergent Plate Boundary - Continental When diverging boundary occurs on land, a 'rift', or separation will arise Over time that mass of land will break apart into distinct land masses and the surrounding water will fill the space between them

2. Convergent Boundaries Convergence: When plates collide There are 3 types of convergent boundaries: 1)Oceanic-Continental Convergence 2) Oceanic-Oceanic Convergence 3) Continental-Continental Convergence.

Convergence: 1) Oceanic-Continental When an ocean plate and a continental plate bang into each other, the thinner plate (ocean plate) gets pushed under the thicker plate (continental plate). This leaves a trench where the two plates meet

Diagram for your notes

Convergence: 2) Oceanic-Oceanic When two oceanic plates collide one is usually pushed under the other and in the process a deep oceanic trench is formed.

Diagram for your notes

Convergence: 3) Continental-Continental When two continental plates bang into each other, they get pushed up and make mountains.

Diagram for your notes

Continental-Continental

3. Transform/ Sliding Transform happens when ocean plates or continental plates move beside each other. When they try to slide past each other, they sometimes get stuck. Pressure builds up and eventually they slide very quickly. This can cause an earthquake. Earthquakes can cause lots of damage.

Transform/ Sliding Diagram for your notes

Transform/ Sliding