Presentation Transcript
earth’s geologic structure :earth’s geologic structure JAY ALLEN ALEX CALL
What Is Geologic Structure? :What Is Geologic Structure? Geologic Structure is the study of the components that make up a certain object
Earth’s geologic structure is composed of different layers ranging from five to 6,360 kilometers thick
Layers of the Earth :Layers of the Earth Crust
Lithosphere
Mantle
Upper Mantle
Lithosphere
Athenosphere
Lower Mantle
Mesosphere
Core
Inner Core
Outer Core
Earth’s Layers :Earth’s Layers Crust Mantle Core Lithosphere Asthenosphere Mesosphere Outer Core Inner Core
Crust :Crust Surface Layer
Part of Lithosphere
Contains all tectonic plates
Millions of years ago Earth consisted of one supercontinent- Pangea
Mantle :Mantle Consists of dense, iron rich materials
Includes Asthenosphere
Contains Slow-flowing rock
Also encompasses Mesosphere
Contains solid rock
Core :Core Two Components
Outer Core
Shell to Inner Core
Generates Magma
Contains Nickel and Liquid Iron
Inner Core
Contains Nickel and Solid Iron
Seismic Waves :Seismic Waves Predecessors of Earthquakes
Vibrations travel through all layers of Earth
Direction and speed are constantly changing
Assists in determining the geologic structure
Also helps in revealing Earth’s history
Outer Core
Bibliography :Bibliography Structure of the Earth - Wikipedia, the free encyclopedia. (n.d.). Retrieved February 4, 2009, from http://en.wikipedia.org/wiki/Structure_of_the_Earth.
Todd, R. (2002). Holt Science and Technology, Texas Edition Grade Eight. Austin, Texas: Holt, Rinehart, and Winston.
(2008). The World Book Encyclopedia 2008. Buffalo, NY: World Book.
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