Plate Boundaries Beneath the Sea
1. Introduction to Plate Boundaries

Expedition Menu

1. Introduction

2. Boundary Types

3. Divergent
4. Spreading Rates
5. Lithosphere
6. Age-Depth
7. Profile
8. Age
9. Equation
10. Convergent
11. Earthquakes
12, Transform
13. Review



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Much like the previous expedition, this expedition makes extensive use of graphics contained in 
"This Dynamic Planet - The Story of Plate Tectonics

An Excellent Publication by  J. Kious and R. Tilling
 of the U.S. Geological Survey.

In this expedition we will examine the creation, evolution and destruction of the crust of the earth below the oceans at the boundaries between the plates.    Remember that the crust of the earth is the upper part of the rigid outer layer of the earth, called the lithosphere, which composes the major plates.

The process of plate motion results in the slow, yet powerful, interaction between the plates, ultimately causing the earthquakes that shake the Earth and the volcanoes that erupt ash, gas and hot lava...often creating new rock on the surface of the Earth, especially under the oceans. 

Expedition Objectives:  We will learn about the dynamic nature of the Earth.  Students will come to understand that the surface of the Earth, including that portion under the sea (approximately 70% of the earth's surface), is in a state of constant formation and motion, ultimately to be recycled back into the interior of the Earth over many ten's of millions of years.  This process has influenced the chemistry of the ocean and atmosphere, and therefore, life on this planet.  It may have even resulted in the origin of life on this planet as we will explore in subsequent expedition.

Active Volcanoes
Explosive Eruptions
Gigantic Mountains
Devastating Earthquakes
Created By:
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Don Reed
Dept. of Geology
San Jose State University
©Copyright 2008
Last Updated on 
Sept. 29, 2008

What are the three types of plate boundaries ?