Seismology & Mantle
Page
number
G p30
Question
1.
2.
3.
4.
5.
6.
What is the seismic evidence that indicates a solid mantle?
What is the main rock type in the mantle?
State three lines of evidence that support this composition of the mantle.
What is the Low Velocity Zone (LVZ), where is it and why does it exist?
What is the asthenosphere?
What is the physical state of the asthenosphere and what is the
significance of this in the theory of plate tectonics?
7. What represents the boundary between the asthenosphere and
lithosphere?
8. What is the lithosphere?
9. Which 2 layers make up the lithosphere?
10. Why does the lithosphere vary in thickness?
E p472 11. Why are there two weak seismic discontinuities within the mantle at
450km and 670km depth?
G p30
G p12
12. Copy Figure 2.11 from p 30. Add a label for lithospheric mantle (as
described on p 12)
Page numbers refer to the pages in the following text books:
G = Geoscience (Edwards & King)
GS = Geological Science (McLeish)
E = Earth (Press & Siever)
GEOTREX | Contributor: Ben Church | Establishment: Monmouth Comprehensive School | Date: 11/04/2005