G100: Earth Revealed

Start by entering you name and the episode. Then, based upon the video, respond to the following topics. When you are happy with your answers, select "Submit Assignment" to send the file to me.

 

 

Episode 4: The Sea Floor

 

Your Name

 

Episode

 

What is the main type of igneous rock that forms the crust of the sea floor?

 

Describe terrigenous and pelagic sediments. What are they, where do they come from, and how do they differ?

 

How old is the igneous crust that forms the sea floor? It it the same age everywhere, or do the ages differ? If so, how and why?

 

We all need metals in our lives. What important metallic resources can be found in (and on) the sea floor?

 

What is a hydrothermal vent? Where and how do they form, and what unique ecological environments do they support?

 

 

 

You are GeoManiac number since April 1, 1997