Class Notes (838,384)
Canada (510,870)
EESA06H3 (568)
Nick Eyles (500)
Lecture 3

Lecture 3 - How Oceans Form The African Rift

2 Pages
117 Views
Unlock Document

Department
Environmental Science
Course
EESA06H3
Professor
Nick Eyles
Semester
Winter

Description
Lecture 3 - How Oceans Form: The African Rift Monday, January 23, 2012 12:51 AM No required reading for this lecture. The African Rift from Kenya, Ethiopia, Egypt, Jordan and Israel Uniformitarianism Catastrophism Vertical Tectonics Rifts  Rifts widen into young oceans  Failed rifts are preserved in modern continents from the break up of Pangea  Triple Junctions and Aulacogens o 3 arms to the rift o Only 2 of the arms "grow up" and become active o The third cracks and never develops o Failed rifts fill up with sediment and contain a lot of oil and gas o The St. Lawrence is sitting right on top of a failed rift o When they are reactivated, there are intra margin earthquakes o There are triple junctions all over the world  Flood basalts o Decompression melting  Mantle plumes in low pressure o Basalt - iron and magnesium rich rock  Very fluid, like blood How Oceans Grow Stage 1: East African Rift Continent undergoes extension. The crust is thinned and a rift valley forms. Stage 2: Red Sea Continent tears in two. Continent edges are faulted and uplifted. Basalt eruptions form oceanic crust. Stage 3: Atlantic Ocean Conti
More Less

Related notes for EESA06H3

Log In


OR

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


OR

By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.


Submit