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Rifts and Ridges in the Creation of Continents

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Ikram Mohamed

on 10 October 2013

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Transcript of Rifts and Ridges in the Creation of Continents

photo credit Nasa / Goddard Space Flight Center / Reto Stöckli
Rifts and Ridges in the Creation of Continents
Presentation by Ikram and Sasha

What are Rifts and Ridges
A linear zone where the Earth's crust and lithosphere are being pulled apart
Is a geological feature consisting of a chain of mountains or hills that form a continuous elevated crest.

Plate Techtonics
Four Types of Plate Convergences:

Transform Boundaries
Plate Boundary Zones

How are Rifts formed?
How are Ridges Formed?
Examples of Rifts and Ridges

Theory of Continental Drift
The East African Rift
The Red Sea Rift
The Baikal Rift Zone
The Gulf of Suez Rift
The Rio Grande Rift in the Southwestern US
Dendritic Ridge
Stratigraphic Ridge
Oceanic Spreading Ridge
Crater Ridges
Volcanic Crater/Caldera Ridges
Fault Ridges
Dune Ridges

The name Pangea is ancient Greek and means "all lands."

The term began being used in the early 20th century by Alfred Wegener (a German Geologist)

Pangea, was a supercontinent that existed on the Earth millions of years ago and covered about one-third of its surface.

It is believed that Pangea began forming about 300 million years ago, was fully together by 270 million years ago and began to separate around 200 million years ago.

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