ATM 107 The Oceans

Ch. 3 – Plate Tectonics

Wed., 9 September 2015

Daily Announcements:

1) There are still seats available for this course via CPN.

2) Last day to drop any course (without receiving a “W”)

is today.

Song #1: “Ain’t No Mountain High Enough” by Diana Ross

Song #2: “Volcano” by Jimmy Buffett

Text Source Today: 3.4, 3.5

· Magnetic Polar Reversal (continued) Notes Template

· Plate Tectonics: a unified theory PDF DOC

· Three Types of Plate Boundaries, (Rap Version)

· Rift Zones (Ridges and Rises)

· Subduction Zones (Trenches, Volcanoes and Mountain Ranges)

Study Guide Material (Stacey’s Guide) :

1) Explain Earth’s current magnetic field and what happens during a polar reversal.

2) What is the average time between reversals? When was the last one?

3) Why is “Plate Tectonics” referred to as a “unified theory?” Of what?

4) Be aware of the 7 major lithospheric plates of “Plate Tectonics Theory” and

that there are 8 smaller plates.

5) What are the three (3) types of plate boundaries?

6) What geologic features are found at each type of plate boundary?

7) What is a “rift zone”? Give some examples in each stage of development.

8) What is a “subduction zone?” Give some examples. What is the name of the

deepest trench and where is it located? What is the name of the tallest (land based)

mountain and where is it located?

9) What kind of volcanoes are associated with subduction zones? Why is their magma

different in composition from the magma associated with ridges and rises?

10)What is an “island arc system?” How do they form? Give some examples.