{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Lecture 2 (September 2)

Lecture 2 (September 2) - South America and Africa were...

Info icon This preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
South America and Africa were stuck together for the first 60 million years the Atlantic Ocean was opening The Red Sea started opening 10 million years ago East African Rift: trying to form a new continent and ocean basin (same thing happened to Madagascar 100 million years ago) Olduvai Gorge Niger Failed Rift Arm (aulochogene): northwest Africa from central Africa o Usually 2 of the arms work and one of them fails o Diagram in Notebook Intra-Plate Earthquakes: rare but sometimes large o New Madrid, MO: three large eqs (M7-&7.5) Winter 1811 – 1812 (weird place, in middle of continent) o The largest that have ever struck the U.S. (clearly nonsense) 500 million years ago there is a failed rift arm where the Mississippi River (that’s why there’s a low point, the crust is weak) Convergent Boundaries: basically surround the Pacific everywhere except California Diagram in Notebook: Subduction Zones Volcanoes occur always nearly right above where the slab hits the 125 km depth o
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern