Mid-ocean ridges (MORs)

2/10/03


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Table of Contents

Mid-ocean ridges (MORs)

MORs continued

Oceanic fracture zones (FZ’s)

Oceanic fracture zones (FZ’s)

Earthquakes in MOR-FZ systems

Deep-ocean trenches (DOT’s)

Deep-ocean trenches (DOT’s)

PPT Slide

Why do continents and oceans differ so much?

Interior of earth is warmer than the exterior

Rocks inside earth are denser than rock at surface

These two observations led earth scientists to the hypothesis of isostacy

What causes differences in average elevation of continents and oceans?

Earth is opaque. How can I state confidently what is the character of rock at depth? How can one determine more information about earth’s crust and its relationship to earth’s interior?

Author: Steven Wojtal

Email: steven.wojtal@oberlin.edu

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