G100: Earth Revealed

Start by entering your 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.

 

Please include the Course, Episode number, and your name in the Subject of your email (G100: Ep. X - Last Name).

 

 

Episode 14: Intrusive Igneous Rocks

 

The questions for those who want to copy into Word:

1. What factors contribute to the formation of a magma? How are mafic, intermediate, and felsic magmas the same and how are they different?

2. How does a magma's cooling history relate to the formation of phaneritic, aphanitic, and glassy textures?

3. How do the various magma compositions relate to plate boundaries?

4. What are xenoliths and what do they represent?

5. How do the igneous rocks that are found on the continents differ from those on the sea floor? How are they the same?

 

 

For those using the "fill-in-the-form" method:

 

 

Your Name

 

Episode

 

What factors contribute to the formation of a magma? How are mafic, intermediate, and felsic magmas the same and how are they different?

 

How does a magma's cooling history relate to the formation of phaneritic, aphanitic, and glassy textures?

 

How do the various magma compositions relate to plate boundaries?

 

What are xenoliths and what do they represent?

 

How do the igneous rocks that are found on the continents differ from those on the sea floor? How are they the same?

 

 

 

You are GeoManiac number since April 1, 1997