Plate Boundaries By - Blair Menchue

DIVERGENT PLATE BOUNDARIES

Oceanic and Continental Divergent Plates

Divergent plate boundaries separate from each other, or spread apart. This is caused by tension between the plates.

When Oceanic plates separate, mid ocean ridges and volcanoes may be formed, while earthquakes may occur. Examples of these are the Mid-Atlantic Ridge and the East Pacific Ridge.

Mid-Atlantic Ridge

When continental plates separate, usually rifts or volcanoes are formed in the process, and example of these are Mt. Kilimanjaro and the East African Rift

Mt. Kilimanjaro (Left) and the East African Rift (Right)
The Volcano, Katla

Katla is a volcano in Iceland. It is a very active volcano and has had 20 eruptions between 930 and 1918, at intervals of 13–95 years.

In 934 there was a VE-5 or VE-6 eruption, which was a severe fissure eruption. It was the largest eruption in the past 10,000 years.

Convergent Plate Boundaries

Convergent Plate Boundaries slide towards each other due to compression. This usually causes the creations of deep ocean trenches and volcanic arcs (oceanic plate to continental plate) or mountains (continental to continental plates)

Mariana Trench
Chile Earthquake: May 1960

Largest earthquake recorded. Miles of rips through the earth's crust along with an enormous tsunami from the Pacific Ocean.

Transform Plate Boundaries

Transform plate boundaries slide past each other due to shear stress. This movement can cause the creation of fault zones, transform faults, and earthquakes

San Andreas Fault

Approximately 100 years ago, in a morning of San Fransisco were awoken from a strong earthquake that lasted only about a minute. This event caused many buildings to collapse, and broken gas pipes set a majority of the city in flames.

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